Source code for h2o.model.binomial

# -*- encoding: utf-8 -*-
from __future__ import absolute_import, division, print_function, unicode_literals
from h2o.utils.compatibility import *  # NOQA

from h2o.exceptions import H2OValueError
from h2o.utils.typechecks import assert_is_type
from .extensions import has_extension
from .model_base import ModelBase
from ..utils.metaclass import deprecated_params


[docs]class H2OBinomialModel(ModelBase):
[docs] def F1(self, thresholds=None, train=False, valid=False, xval=False): """ Get the F1 value for a set of thresholds. If all are ``False`` (default), then return the training metric value. If more than one option is set to ``True``, then return a dictionary of metrics where the keys are "train", "valid", and "xval". :param thresholds: If None, then the threshold maximizing the metric will be used. :param bool train: If ``True``, return the F1 value for the training data. :param bool valid: If ``True``, return the F1 value for the validation data. :param bool xval: If ``True``, return the F1 value for each of the cross-validated splits. :returns: The F1 values for the specified key(s). :examples: >>> cars = h2o.import_file("https://s3.amazonaws.com/h2o-public-test-data/smalldata/junit/cars_20mpg.csv") >>> cars["economy_20mpg"] = cars["economy_20mpg"].asfactor() >>> r = cars[0].runif() >>> train = cars[r > .2] >>> valid = cars[r <=.2] >>> response_col = "economy_20mpg" >>> distribution = "bernoulli" >>> predictors = ["displacement", "power", "weight", "acceleration", "year"] >>> from h2o.estimators.gbm import H2OGradientBoostingEstimator >>> gbm = H2OGradientBoostingEstimator(nfolds=3, ... distribution=distribution, ... fold_assignment="Random") >>> gbm.train(y=response_col, ... x=predictors, ... validation_frame=valid, ... training_frame=train) >>> gbm.F1()# <- Default: return training metric value >>> gbm.F1(train=True, valid=True, xval=True) """ return self.metric('f1', thresholds, train, valid, xval)
[docs] def F2(self, thresholds=None, train=False, valid=False, xval=False): """ Get the F2 for a set of thresholds. If all are ``False`` (default), then return the training metric value. If more than one option is set to ``True``, then return a dictionary of metrics where the keys are "train", "valid", and "xval". :param thresholds: If None, then the threshold maximizing the metric will be used. :param bool train: If ``True``, return the F2 value for the training data. :param bool valid: If ``True``, return the F2 value for the validation data. :param bool xval: If ``True``, return the F2 value for each of the cross-validated splits. :returns: The F2 values for the specified key(s). :examples: >>> cars = h2o.import_file("https://s3.amazonaws.com/h2o-public-test-data/smalldata/junit/cars_20mpg.csv") >>> cars["economy_20mpg"] = cars["economy_20mpg"].asfactor() >>> r = cars[0].runif() >>> train = cars[r > .2] >>> valid = cars[r <=.2] >>> response_col = "economy_20mpg" >>> distribution = "bernoulli" >>> predictors = ["displacement", "power", "weight", "acceleration", "year"] >>> from h2o.estimators.gbm import H2OGradientBoostingEstimator >>> gbm = H2OGradientBoostingEstimator(nfolds=3, ... distribution=distribution, ... fold_assignment="Random") >>> gbm.train(y=response_col, ... x=predictors, ... validation_frame=valid, ... training_frame=train) >>> gbm.F2() # <- Default: return training metric value >>> gbm.F2(train=True, valid=True, xval=True) """ return self.metric('f2', thresholds, train, valid, xval)
[docs] def F0point5(self, thresholds=None, train=False, valid=False, xval=False): """ Get the F0.5 for a set of thresholds. If all are ``False`` (default), then return the training metric value. If more than one option is set to ``True``, then return a dictionary of metrics where the keys are "train", "valid", and "xval". :param thresholds: If None, then the threshold maximizing the metric will be used. :param bool train: If ``True``, return the F0.5 value for the training data. :param bool valid: If ``True``, return the F0.5 value for the validation data. :param bool xval: If ``True``, return the F0.5 value for each of the cross-validated splits. :returns: The F0.5 values for the specified key(s). :examples: >>> cars = h2o.import_file("https://s3.amazonaws.com/h2o-public-test-data/smalldata/junit/cars_20mpg.csv") >>> cars["economy_20mpg"] = cars["economy_20mpg"].asfactor() >>> r = cars[0].runif() >>> train = cars[r > .2] >>> valid = cars[r <=.2] >>> response_col = "economy_20mpg" >>> distribution = "bernoulli" >>> predictors = ["displacement", "power", "weight", "acceleration", "year"] >>> gbm = H2OGradientBoostingEstimator(nfolds=3, ... distribution=distribution, ... fold_assignment="Random") >>> gbm.train(y=response_col, ... x=predictors, ... validation_frame=valid, ... training_frame=train) >>> F0point5 = gbm.F0point5() # <- Default: return training metric value >>> F0point5 = gbm.F0point5(train=True, valid=True, xval=True) """ return self.metric('f0point5', thresholds, train, valid, xval)
[docs] def accuracy(self, thresholds=None, train=False, valid=False, xval=False): """ Get the accuracy for a set of thresholds. If all are ``False`` (default), then return the training metric value. If more than one option is set to ``True``, then return a dictionary of metrics where the keys are "train", "valid", and "xval". :param thresholds: If None, then the threshold maximizing the metric will be used. :param bool train: If ``True``, return the accuracy value for the training data. :param bool valid: If ``True``, return the accuracy value for the validation data. :param bool xval: If ``True``, return the accuracy value for each of the cross-validated splits. :returns: The accuracy values for the specified key(s). :examples: >>> cars = h2o.import_file("https://s3.amazonaws.com/h2o-public-test-data/smalldata/junit/cars_20mpg.csv") >>> cars["economy_20mpg"] = cars["economy_20mpg"].asfactor() >>> r = cars[0].runif() >>> train = cars[r > .2] >>> valid = cars[r <=.2] >>> response_col = "economy_20mpg" >>> distribution = "bernoulli" >>> predictors = ["displacement", "power", "weight", "acceleration", "year"] >>> from h2o.estimators.gbm import H2OGradientBoostingEstimator >>> gbm = H2OGradientBoostingEstimator(nfolds=3, ... distribution=distribution, ... fold_assignment="Random") >>> gbm.train(y=response_col, ... x=predictors, ... validation_frame=valid, ... training_frame=train) >>> gbm.accuracy() # <- Default: return training metric value >>> gbm.accuracy(train=True, valid=True, xval=True) """ return self.metric('accuracy', thresholds, train, valid, xval)
[docs] def error(self, thresholds=None, train=False, valid=False, xval=False): """ Get the error for a set of thresholds. If all are ``False`` (default), then return the training metric value. If more than one option is set to ``True``, then return a dictionary of metrics where the keys are "train", "valid", and "xval". :param thresholds: If None, then the threshold minimizing the error will be used. :param bool train: If ``True``, return the error value for the training data. :param bool valid: If ``True``, return the error value for the validation data. :param bool xval: If ``True``, return the error value for each of the cross-validated splits. :returns: The error values for the specified key(s). :examples: >>> cars = h2o.import_file("https://s3.amazonaws.com/h2o-public-test-data/smalldata/junit/cars_20mpg.csv") >>> cars["economy_20mpg"] = cars["economy_20mpg"].asfactor() >>> r = cars[0].runif() >>> train = cars[r > .2] >>> valid = cars[r <=.2] >>> response_col = "economy_20mpg" >>> distribution = "bernoulli" >>> predictors = ["displacement", "power", "weight", "acceleration", "year"] >>> from h2o.estimators.gbm import H2OGradientBoostingEstimator >>> gbm = H2OGradientBoostingEstimator(nfolds=3, ... distribution=distribution, ... fold_assignment="Random") >>> gbm.train(y=response_col, ... x=predictors, ... validation_frame=valid, ... training_frame=train) >>> gbm.error() # <- Default: return training metric >>> gbm.error(train=True, valid=True, xval=True) """ return self.metric('error', thresholds, train, valid, xval)
[docs] def precision(self, thresholds=None, train=False, valid=False, xval=False): """ Get the precision for a set of thresholds. If all are ``False`` (default), then return the training metric value. If more than one option is set to ``True``, then return a dictionary of metrics where the keys are "train", "valid", and "xval". :param thresholds: If None, then the threshold maximizing the metric will be used. :param bool train: If ``True``, return the precision value for the training data. :param bool valid: If ``True``, return the precision value for the validation data. :param bool xval: If ``True``, return the precision value for each of the cross-validated splits. :returns: The precision values for the specified key(s). :examples: >>> cars = h2o.import_file("https://s3.amazonaws.com/h2o-public-test-data/smalldata/junit/cars_20mpg.csv") >>> cars["economy_20mpg"] = cars["economy_20mpg"].asfactor() >>> r = cars[0].runif() >>> train = cars[r > .2] >>> valid = cars[r <=.2] >>> response_col = "economy_20mpg" >>> distribution = "bernoulli" >>> predictors = ["displacement", "power", "weight", "acceleration", "year"] >>> from h2o.estimators.gbm import H2OGradientBoostingEstimator >>> gbm = H2OGradientBoostingEstimator(nfolds=3, ... distribution=distribution, ... fold_assignment="Random") >>> gbm.train(y=response_col, ... x=predictors, ... validation_frame=valid, ... training_frame=train) >>> gbm.precision() # <- Default: return training metric value >>> gbm.precision(train=True, valid=True, xval=True) """ return self.metric('precision', thresholds, train, valid, xval)
[docs] def tpr(self, thresholds=None, train=False, valid=False, xval=False): """ Get the True Positive Rate for a set of thresholds. If all are ``False`` (default), then return the training metric value. If more than one option is set to ``True``, then return a dictionary of metrics where the keys are "train", "valid", and "xval". :param thresholds: If None, then the threshold maximizing the metric will be used. :param bool train: If ``True``, return the TPR value for the training data. :param bool valid: If ``True``, return the TPR value for the validation data. :param bool xval: If ``True``, return the TPR value for each of the cross-validated splits. :returns: The TPR values for the specified key(s). :examples: >>> cars = h2o.import_file("https://s3.amazonaws.com/h2o-public-test-data/smalldata/junit/cars_20mpg.csv") >>> cars["economy_20mpg"] = cars["economy_20mpg"].asfactor() >>> r = cars[0].runif() >>> train = cars[r > .2] >>> valid = cars[r <=.2] >>> response_col = "economy_20mpg" >>> distribution = "bernoulli" >>> predictors = ["displacement", "power", "weight", "acceleration", "year"] >>> from h2o.estimators.gbm import H2OGradientBoostingEstimator >>> gbm = H2OGradientBoostingEstimator(nfolds=3, ... distribution=distribution, ... fold_assignment="Random") >>> gbm.train(y=response_col, ... x=predictors, ... validation_frame=valid, ... training_frame=train) >>> gbm.tpr() # <- Default: return training metric >>> gbm.tpr(train=True, valid=True, xval=True) """ return self.metric('tpr', thresholds, train, valid, xval)
[docs] def tnr(self, thresholds=None, train=False, valid=False, xval=False): """ Get the True Negative Rate for a set of thresholds. If all are ``False`` (default), then return the training metric value. If more than one option is set to ``True``, then return a dictionary of metrics where the keys are "train", "valid", and "xval". :param thresholds: If None, then the threshold maximizing the metric will be used. :param bool train: If ``True``, return the TNR value for the training data. :param bool valid: If ``True``, return the TNR value for the validation data. :param bool xval: If ``True``, return the TNR value for each of the cross-validated splits. :returns: The TNR values for the specified key(s). :examples: >>> cars = h2o.import_file("https://s3.amazonaws.com/h2o-public-test-data/smalldata/junit/cars_20mpg.csv") >>> cars["economy_20mpg"] = cars["economy_20mpg"].asfactor() >>> r = cars[0].runif() >>> train = cars[r > .2] >>> valid = cars[r <=.2] >>> response_col = "economy_20mpg" >>> distribution = "bernoulli" >>> predictors = ["displacement", "power", "weight", "acceleration", "year"] >>> from h2o.estimators.gbm import H2OGradientBoostingEstimator >>> gbm = H2OGradientBoostingEstimator(nfolds=3, ... distribution=distribution, ... fold_assignment="Random") >>> gbm.train(y=response_col, ... x=predictors, ... validation_frame=valid, ... training_frame=train) >>> gbm.tnr() # <- Default: return training metric >>> gbm.tnr(train=True, valid=True, xval=True) """ return self.metric('tnr', thresholds, train, valid, xval)
[docs] def fnr(self, thresholds=None, train=False, valid=False, xval=False): """ Get the False Negative Rates for a set of thresholds. If all are ``False`` (default), then return the training metric value. If more than one option is set to ``True``, then return a dictionary of metrics where the keys are "train", "valid", and "xval". :param thresholds: If None, then the threshold maximizing the metric will be used. :param bool train: If ``True``, return the FNR value for the training data. :param bool valid: If ``True``, return the FNR value for the validation data. :param bool xval: If ``True``, return the FNR value for each of the cross-validated splits. :returns: The FNR values for the specified key(s). :examples: >>> cars = h2o.import_file("https://s3.amazonaws.com/h2o-public-test-data/smalldata/junit/cars_20mpg.csv") >>> cars["economy_20mpg"] = cars["economy_20mpg"].asfactor() >>> r = cars[0].runif() >>> train = cars[r > .2] >>> valid = cars[r <= .2] >>> response_col = "economy_20mpg" >>> distribution = "bernoulli" >>> predictors = ["displacement","power","weight","acceleration","year"] >>> from h2o.estimators import H2OGradientBoostingEstimator >>> gbm = H2OGradientBoostingEstimator(nfolds=3, ... distribution=distribution, ... fold_assignment="Random") >>> gbm.train(y=response_col, ... x=predictors, ... validation_frame=valid, ... training_frame=train) >>> gbm.fnr() # <- Default: return training metric >>> gbm.fnr(train=True, valid=True, xval=True) """ return self.metric('fnr', thresholds, train, valid, xval)
[docs] def fpr(self, thresholds=None, train=False, valid=False, xval=False): """ Get the False Positive Rates for a set of thresholds. If all are ``False`` (default), then return the training metric value. If more than one option is set to ``True``, then return a dictionary of metrics where the keys are "train", "valid", and "xval". :param thresholds: If None, then the threshold maximizing the metric will be used. :param bool train: If ``True``, return the FPR value for the training data. :param bool valid: If ``True``, return the FPR value for the validation data. :param bool xval: If ``True``, return the FPR value for each of the cross-validated splits. :returns: The FPR values for the specified key(s). :examples: >>> cars = h2o.import_file("https://s3.amazonaws.com/h2o-public-test-data/smalldata/junit/cars_20mpg.csv") >>> cars["economy_20mpg"] = cars["economy_20mpg"].asfactor() >>> r = cars[0].runif() >>> train = cars[r > .2] >>> valid = cars[r <= .2] >>> response_col = "economy_20mpg" >>> distribution = "bernoulli" >>> predictors = ["displacement","power","weight","acceleration","year"] >>> from h2o.estimators import H2OGradientBoostingEstimator >>> gbm = H2OGradientBoostingEstimator(nfolds=3, ... distribution=distribution, ... fold_assignment="Random") >>> gbm.train(y=response_col, ... x=predictors, ... validation_frame=valid, ... training_frame=train) >>> gbm.fpr() # <- Default: return training metric >>> gbm.fpr(train=True, valid=True, xval=True) """ return self.metric('fpr', thresholds, train, valid, xval)
[docs] def recall(self, thresholds=None, train=False, valid=False, xval=False): """ Get the recall for a set of thresholds (aka True Positive Rate). If all are ``False`` (default), then return the training metric value. If more than one option is set to ``True``, then return a dictionary of metrics where the keys are "train", "valid", and "xval". :param thresholds: If None, then the threshold maximizing the metric will be used. :param bool train: If ``True``, return the recall value for the training data. :param bool valid: If ``True``, return the recall value for the validation data. :param bool xval: If ``True``, return the recall value for each of the cross-validated splits. :returns: The recall values for the specified key(s). :examples: >>> cars = h2o.import_file("https://s3.amazonaws.com/h2o-public-test-data/smalldata/junit/cars_20mpg.csv") >>> cars["economy_20mpg"] = cars["economy_20mpg"].asfactor() >>> r = cars[0].runif() >>> train = cars[r > .2] >>> valid = cars[r <= .2] >>> response_col = "economy_20mpg" >>> distribution = "bernoulli" >>> predictors = ["displacement","power","weight","acceleration","year"] >>> from h2o.estimators import H2OGradientBoostingEstimator >>> gbm = H2OGradientBoostingEstimator(nfolds=3, ... distribution=distribution, ... fold_assignment="Random") >>> gbm.train(y=response_col, ... x=predictors, ... validation_frame=valid, ... training_frame=train) >>> gbm.recall() # <- Default: return training metric >>> gbm.recall(train=True, valid=True, xval=True) """ return self.metric('recall', thresholds, train, valid, xval)
[docs] def sensitivity(self, thresholds=None, train=False, valid=False, xval=False): """ Get the sensitivity for a set of thresholds (aka True Positive Rate or Recall). If all are ``False`` (default), then return the training metric value. If more than one option is set to ``True``, then return a dictionary of metrics where the keys are "train", "valid", and "xval". :param thresholds: If None, then the threshold maximizing the metric will be used. :param bool train: If ``True``, return the sensitivity value for the training data. :param bool valid: If ``True``, return the sensitivity value for the validation data. :param bool xval: If ``True``, return the sensitivity value for each of the cross-validated splits. :returns: The sensitivity values for the specified key(s). :examples: >>> cars = h2o.import_file("https://s3.amazonaws.com/h2o-public-test-data/smalldata/junit/cars_20mpg.csv") >>> cars["economy_20mpg"] = cars["economy_20mpg"].asfactor() >>> r = cars[0].runif() >>> train = cars[r > .2] >>> valid = cars[r <= .2] >>> response_col = "economy_20mpg" >>> distribution = "bernoulli" >>> predictors = ["displacement","power","weight","acceleration","year"] >>> from h2o.estimators import H2OGradientBoostingEstimator >>> gbm = H2OGradientBoostingEstimator(nfolds=3, ... distribution=distribution, ... fold_assignment="Random") >>> gbm.train(y=response_col, ... x=predictors, ... validation_frame=valid, ... training_frame=train) >>> gbm.sensitivity() # <- Default: return training metric >>> gbm.sensitivity(train=True, valid=True, xval=True) """ return self.metric('sensitivity', thresholds, train, valid, xval)
[docs] def fallout(self, thresholds=None, train=False, valid=False, xval=False): """ Get the fallout for a set of thresholds (aka False Positive Rate). If all are ``False`` (default), then return the training metric value. If more than one option is set to ``True``, then return a dictionary of metrics where the keys are "train", "valid", and "xval". :param thresholds: If None, then the threshold maximizing the metric will be used. :param bool train: If ``True``, return the fallout value for the training data. :param bool valid: If ``True``, return the fallout value for the validation data. :param bool xval: If ``True``, return the fallout value for each of the cross-validated splits. :returns: The fallout values for the specified key(s). :examples: >>> cars = h2o.import_file("https://s3.amazonaws.com/h2o-public-test-data/smalldata/junit/cars_20mpg.csv") >>> cars["economy_20mpg"] = cars["economy_20mpg"].asfactor() >>> r = cars[0].runif() >>> train = cars[r > .2] >>> valid = cars[r <= .2] >>> response_col = "economy_20mpg" >>> distribution = "bernoulli" >>> predictors = ["displacement","power","weight","acceleration","year"] >>> from h2o.estimators import H2OGradientBoostingEstimator >>> gbm = H2OGradientBoostingEstimator(nfolds=3, ... distribution=distribution, ... fold_assignment="Random") >>> gbm.train(y=response_col, ... x=predictors, ... validation_frame=valid, ... training_frame=train) >>> gbm.fallout() # <- Default: return training metric >>> gbm.fallout(train=True, valid=True, xval=True) """ return self.metric('fallout', thresholds, train, valid, xval)
[docs] def missrate(self, thresholds=None, train=False, valid=False, xval=False): """ Get the miss rate for a set of thresholds (aka False Negative Rate). If all are ``False`` (default), then return the training metric value. If more than one option is set to ``True``, then return a dictionary of metrics where the keys are "train", "valid", and "xval". :param thresholds: If None, then the threshold maximizing the metric will be used. :param bool train: If ``True``, return the miss rate value for the training data. :param bool valid: If ``True``, return the miss rate value for the validation data. :param bool xval: If ``True``, return the miss rate value for each of the cross-validated splits. :returns: The miss rate values for the specified key(s). :examples: >>> cars = h2o.import_file("https://s3.amazonaws.com/h2o-public-test-data/smalldata/junit/cars_20mpg.csv") >>> cars["economy_20mpg"] = cars["economy_20mpg"].asfactor() >>> r = cars[0].runif() >>> train = cars[r > .2] >>> valid = cars[r <= .2] >>> response_col = "economy_20mpg" >>> distribution = "bernoulli" >>> predictors = ["displacement","power","weight","acceleration","year"] >>> from h2o.estimators import H2OGradientBoostingEstimator >>> gbm = H2OGradientBoostingEstimator(nfolds=3, ... distribution=distribution, ... fold_assignment="Random") >>> gbm.train(y=response_col, ... x=predictors, ... validation_frame=valid, ... training_frame=train) >>> gbm.missrate() # <- Default: return training metric >>> gbm.missrate(train=True, valid=True, xval=True) """ return self.metric('missrate', thresholds, train, valid, xval)
[docs] def specificity(self, thresholds=None, train=False, valid=False, xval=False): """ Get the specificity for a set of thresholds (aka True Negative Rate). If all are ``False`` (default), then return the training metric value. If more than one option is set to ``True``, then return a dictionary of metrics where the keys are "train", "valid", and "xval". :param thresholds: If None, then the threshold maximizing the metric will be used. :param bool train: If ``True``, return the specificity value for the training data. :param bool valid: If ``True``, return the specificity value for the validation data. :param bool xval: If ``True``, return the specificity value for each of the cross-validated splits. :returns: The specificity values for the specified key(s). :examples: >>> cars = h2o.import_file("https://s3.amazonaws.com/h2o-public-test-data/smalldata/junit/cars_20mpg.csv") >>> cars["economy_20mpg"] = cars["economy_20mpg"].asfactor() >>> r = cars[0].runif() >>> train = cars[r > .2] >>> valid = cars[r <=.2] >>> response_col = "economy_20mpg" >>> distribution = "bernoulli" >>> predictors = ["displacement", "power", "weight", "acceleration", "year"] >>> from h2o.estimators.gbm import H2OGradientBoostingEstimator >>> gbm = H2OGradientBoostingEstimator(nfolds=3, ... distribution=distribution, ... fold_assignment="Random") >>> gbm.train(y=response_col, ... x=predictors, ... validation_frame=valid, ... training_frame=train) >>> gbm.specificity() # <- Default: return training metric >>> gbm.specificity(train=True, valid=True, xval=True) """ return self.metric('specificity', thresholds, train, valid, xval)
[docs] def mcc(self, thresholds=None, train=False, valid=False, xval=False): """ Get the MCC for a set of thresholds. If all are ``False`` (default), then return the training metric value. If more than one option is set to ``True``, then return a dictionary of metrics where the keys are "train", "valid", and "xval". :param thresholds: If None, then the threshold maximizing the metric will be used. :param bool train: If ``True``, return the MCC value for the training data. :param bool valid: If ``True``, return the MCC value for the validation data. :param bool xval: If ``True``, return the MCC value for each of the cross-validated splits. :returns: The MCC values for the specified key(s). :examples: >>> cars = h2o.import_file("https://s3.amazonaws.com/h2o-public-test-data/smalldata/junit/cars_20mpg.csv") >>> cars["economy_20mpg"] = cars["economy_20mpg"].asfactor() >>> r = cars[0].runif() >>> train = cars[r > .2] >>> valid = cars[r <=.2] >>> response_col = "economy_20mpg" >>> distribution = "bernoulli" >>> predictors = ["displacement", "power", "weight", "acceleration", "year"] >>> from h2o.estimators.gbm import H2OGradientBoostingEstimator >>> gbm = H2OGradientBoostingEstimator(nfolds=3, ... distribution=distribution, ... fold_assignment="Random") >>> gbm.train(y=response_col, ... x=predictors, ... validation_frame=valid, ... training_frame=train) >>> gbm.mcc() # <- Default: return training metric value >>> gbm.mcc(train=True, valid=True, xval=True) """ return self.metric('mcc', thresholds, train, valid, xval)
[docs] def max_per_class_error(self, thresholds=None, train=False, valid=False, xval=False): """ Get the max per class error for a set of thresholds. If all are ``False`` (default), then return the training metric value. If more than one option is set to ``True``, then return a dictionary of metrics where the keys are "train", "valid", and "xval". :param thresholds: If None, then the threshold minimizing the error will be used. :param bool train: If ``True``, return the max per class error value for the training data. :param bool valid: If ``True``, return the max per class error value for the validation data. :param bool xval: If ``True``, return the max per class error value for each of the cross-validated splits. :returns: The max per class error values for the specified key(s). :examples: >>> cars = h2o.import_file("https://s3.amazonaws.com/h2o-public-test-data/smalldata/junit/cars_20mpg.csv") >>> cars["economy_20mpg"] = cars["economy_20mpg"].asfactor() >>> r = cars[0].runif() >>> train = cars[r > .2] >>> valid = cars[r <=.2] >>> response_col = "economy_20mpg" >>> distribution = "bernoulli" >>> predictors = ["displacement", "power", "weight", "acceleration", "year"] >>> from h2o.estimators.gbm import H2OGradientBoostingEstimator >>> gbm = H2OGradientBoostingEstimator(nfolds=3, ... distribution=distribution, ... fold_assignment="Random") >>> gbm.train(y=response_col, ... x=predictors, ... validation_frame=valid, ... training_frame=train) >>> gbm.max_per_class_error() # <- Default: return training metric value >>> gbm.max_per_class_error(train=True, valid=True, xval=True) """ return self.metric('max_per_class_error', thresholds, train, valid, xval)
[docs] def mean_per_class_error(self, thresholds=None, train=False, valid=False, xval=False): """ Get the mean per class error for a set of thresholds. If all are ``False`` (default), then return the training metric value. If more than one option is set to ``True``, then return a dictionary of metrics where the keys are "train", "valid", and "xval". :param thresholds: If None, then the threshold minimizing the error will be used. :param bool train: If ``True``, return the mean per class error value for the training data. :param bool valid: If ``True``, return the mean per class error value for the validation data. :param bool xval: If ``True``, return the mean per class error value for each of the cross-validated splits. :returns: The mean per class error values for the specified key(s). :examples: >>> cars = h2o.import_file("https://s3.amazonaws.com/h2o-public-test-data/smalldata/junit/cars_20mpg.csv") >>> cars["economy_20mpg"] = cars["economy_20mpg"].asfactor() >>> r = cars[0].runif() >>> train = cars[r > .2] >>> valid = cars[r <= .2] >>> response_col = "economy_20mpg" >>> distribution = "bernoulli" >>> predictors = ["displacement","power","weight","acceleration","year"] >>> from h2o.estimators import H2OGradientBoostingEstimator >>> gbm = H2OGradientBoostingEstimator(nfolds=3, ... distribution=distribution, ... fold_assignment="Random") >>> gbm.train(y=response_col, ... x=predictors, ... validation_frame=valid, ... training_frame=train) >>> gbm.mean_per_class_error() # <- Default: return training metric >>> gbm.mean_per_class_error(train=True, valid=True, xval=True) """ return self.metric('mean_per_class_error', thresholds, train, valid, xval)
[docs] def metric(self, metric, thresholds=None, train=False, valid=False, xval=False): """ Get the metric value for a set of thresholds. If all are ``False`` (default), then return the training metric value. If more than one option is set to ``True``, then return a dictionary of metrics where the keys are "train", "valid", and "xval". :param str metric: name of the metric to retrieve. :param thresholds: If None, then the threshold maximizing the metric will be used (or minimizing it if the metric is an error). :param bool train: If ``True``, return the metric value for the training data. :param bool valid: If ``True``, return the metric value for the validation data. :param bool xval: If ``True``, return the metric value for each of the cross-validated splits. :returns: The metric values for the specified key(s). :examples: >>> cars = h2o.import_file("https://s3.amazonaws.com/h2o-public-test-data/smalldata/junit/cars_20mpg.csv") >>> >>> cars["economy_20mpg"] = cars["economy_20mpg"].asfactor() >>> r = cars[0].runif() >>> train = cars[r > .2] >>> valid = cars[r <= .2] >>> response_col = "economy_20mpg" >>> distribution = "bernoulli" >>> predictors = ["displacement","power","weight","acceleration","year"] # thresholds parameter must be a list (i.e. [0.01, 0.5, 0.99]) >>> thresholds = [0.01,0.5,0.99] >>> gbm = H2OGradientBoostingEstimator(nfolds=3, ... distribution=distribution, ... fold_assignment="Random") >>> gbm.train(y=response_col, ... x=predictors, ... validation_frame=valid, ... training_frame=train) # allowable metrics are absolute_mcc, accuracy, precision, # f0point5, f1, f2, mean_per_class_accuracy, min_per_class_accuracy, # tns, fns, fps, tps, tnr, fnr, fpr, tpr, recall, sensitivity, # missrate, fallout, specificity >>> gbm.metric(metric='tpr', thresholds=thresholds) """ tm = ModelBase._get_metrics(self, train, valid, xval) m = {} for k, v in viewitems(tm): if v is None: m[k] = None elif hasattr(v, metric) and callable(getattr(v, metric)): m[k] = getattr(v, metric)(thresholds=thresholds) else: m[k] = v.metric(metric, thresholds=thresholds) return list(m.values())[0] if len(m) == 1 else m
[docs] def plot(self, timestep="AUTO", metric="AUTO", server=False, save_plot_path=None): """ Plot training set (and validation set if available) scoring history for an H2OBinomialModel. The timestep and metric arguments are restricted to what is available in its scoring history. :param str timestep: A unit of measurement for the x-axis. :param str metric: A unit of measurement for the y-axis. :param bool server: if ``True``, then generate the image inline (using matplotlib's "Agg" backend). :param save_plot_path: a path to save the plot via using matplotlib function savefig. :returns: object that contains the resulting figure (can be accessed using ``result.figure()``) :examples: >>> from h2o.estimators import H2OGeneralizedLinearEstimator >>> benign = h2o.import_file("http://s3.amazonaws.com/h2o-public-test-data/smalldata/logreg/benign.csv") >>> response = 3 >>> predictors = [0, 1, 2, 4, 5, 6, 7, 8, 9, 10] >>> model = H2OGeneralizedLinearEstimator(family="binomial") >>> model.train(x=predictors, y=response, training_frame=benign) >>> model.plot(timestep="AUTO", metric="objective", server=False) """ if not has_extension(self, 'ScoringHistory'): raise H2OValueError("Scoring history plot is not available for this type of model (%s)." % self.algo) valid_metrics = self._allowed_metrics('binomial') if valid_metrics is not None: assert_is_type(metric, 'AUTO', *valid_metrics), "metric for H2OBinomialModel must be one of %s" % valid_metrics if metric == "AUTO": metric = self._default_metric('binomial') or 'AUTO' return self.scoring_history_plot(timestep=timestep, metric=metric, server=server, save_plot_path=save_plot_path)
[docs] def roc(self, train=False, valid=False, xval=False): """ Return the coordinates of the ROC curve for a given set of data. The coordinates are two-tuples containing the false positive rates as a list and true positive rates as a list. If all are ``False`` (default), then return is the training data. If more than one ROC curve is requested, the data is returned as a dictionary of two-tuples. :param bool train: If ``True``, return the ROC value for the training data. :param bool valid: If ``True``, return the ROC value for the validation data. :param bool xval: If ``True``, return the ROC value for each of the cross-validated splits. :returns: The ROC values for the specified key(s). :examples: >>> cars = h2o.import_file("https://s3.amazonaws.com/h2o-public-test-data/smalldata/junit/cars_20mpg.csv") >>> cars["economy_20mpg"] = cars["economy_20mpg"].asfactor() >>> r = cars[0].runif() >>> train = cars[r > .2] >>> valid = cars[r <=.2] >>> response_col = "economy_20mpg" >>> distribution = "bernoulli" >>> predictors = ["displacement", "power", "weight", "acceleration", "year"] >>> from h2o.estimators.gbm import H2OGradientBoostingEstimator >>> gbm = H2OGradientBoostingEstimator(nfolds=3, ... distribution=distribution, ... fold_assignment="Random") >>> gbm.train(y=response_col, ... x=predictors, ... validation_frame=valid, ... training_frame=train) >>> gbm.roc() # <- Default: return training data >>> gbm.roc(train=True, valid=True, xval=True) """ return self._delegate_to_metrics('roc', train, valid, xval)
[docs] def gains_lift(self, train=False, valid=False, xval=False): """ Get the Gains/Lift table for the specified metrics. If all are ``False`` (default), then return the training metric Gains/Lift table. If more than one option is set to ``True``, then return a dictionary of metrics where t he keys are "train", "valid", and "xval". :param bool train: If ``True``, return the gains lift value for the training data. :param bool valid: If ``True``, return the gains lift value for the validation data. :param bool xval: If ``True``, return the gains lift value for each of the cross-validated splits. :returns: The gains lift values for the specified key(s). :examples: >>> cars = h2o.import_file("https://s3.amazonaws.com/h2o-public-test-data/smalldata/junit/cars_20mpg.csv") >>> cars["economy_20mpg"] = cars["economy_20mpg"].asfactor() >>> r = cars[0].runif() >>> train = cars[r > .2] >>> valid = cars[r <=.2] >>> response_col = "economy_20mpg" >>> distribution = "bernoulli" >>> predictors = ["displacement", "power", "weight", "acceleration", "year"] >>> from h2o.estimators.gbm import H2OGradientBoostingEstimator >>> gbm = H2OGradientBoostingEstimator(nfolds=3, ... distribution=distribution, ... fold_assignment="Random") >>> gbm.train(y=response_col, ... x=predictors, ... validation_frame=valid, ... training_frame=train) >>> gbm.gains_lift() # <- Default: return training metric Gain/Lift table >>> gbm.gains_lift(train=True, valid=True, xval=True) """ return self._delegate_to_metrics('gains_lift', train, valid, xval)
[docs] @deprecated_params({'save_to_file': 'save_plot_path'}) def gains_lift_plot(self, type="both", xval=False, server=False, save_plot_path=None, plot=True): """ Plot Gains/Lift curves. :param type: One of: - "both" (default) - "gains" - "lift" :param xval: if ``True``, use cross-validation metrics. :param server: if ``True``, generate plot inline using matplotlib's "Agg" backend. :param save_plot_path: filename to save the plot to. :param plot: ``True`` to plot curve, ``False`` to get a gains lift table :returns: Gains lift table + the resulting plot (can be accessed using ``result.figure()``) """ return self._delegate_to_metrics('gains_lift_plot', type=type, xval=xval, server=server, save_plot_path=save_plot_path, plot=plot)
[docs] def kolmogorov_smirnov(self): """ Retrieves the Kolmogorov-Smirnov metric (K-S metric) for a given binomial model. The number returned is in range between 0 and 1. The K-S metric represents the degree of separation between the positive (1) and negative (0) cumulative distribution functions. Detailed metrics per each group are to be found in the gains-lift table. :return: Kolmogorov-Smirnov metric, a number between 0 and 1. :examples: >>> from h2o.estimators import H2OGradientBoostingEstimator >>> airlines = h2o.import_file("https://s3.amazonaws.com/h2o-public-test-data/smalldata/testng/airlines_train.csv") >>> model = H2OGradientBoostingEstimator(ntrees=1, ... gainslift_bins=20) >>> model.train(x=["Origin", "Distance"], ... y="IsDepDelayed", ... training_frame=airlines) >>> model.kolmogorov_smirnov() """ return max(self.gains_lift()["kolmogorov_smirnov"])
[docs] def confusion_matrix(self, metrics=None, thresholds=None, train=False, valid=False, xval=False): """ Get the confusion matrix for the specified metrics/thresholds. If all are ``False`` (default), then return the training metric value. If more than one option is set to ``True``, then return a dictionary of metrics where the keys are "train", "valid", and "xval" :param metrics: A string (or list of strings) among metrics listed in :const:`H2OBinomialModelMetrics.maximizing_metrics`. Defaults to ``'f1'``. :param thresholds: A value (or list of values) between 0 and 1. If None, then the thresholds maximizing each provided metric will be used. :param bool train: If ``True``, return the confusion matrix value for the training data. :param bool valid: If ``True``, return the confusion matrix value for the validation data. :param bool xval: If ``True``, return the confusion matrix value for each of the cross-validated splits. :returns: The confusion matrix values for the specified key(s). :examples: >>> cars = h2o.import_file("https://s3.amazonaws.com/h2o-public-test-data/smalldata/junit/cars_20mpg.csv") >>> cars["economy_20mpg"] = cars["economy_20mpg"].asfactor() >>> r = cars[0].runif() >>> train = cars[r > .2] >>> valid = cars[r <=.2] >>> response_col = "economy_20mpg" >>> distribution = "bernoulli" >>> predictors = ["displacement", "power", "weight", "acceleration", "year"] >>> from h2o.estimators.gbm import H2OGradientBoostingEstimator >>> gbm = H2OGradientBoostingEstimator(nfolds=3, ... distribution=distribution, ... fold_assignment="Random") >>> gbm.train(y=response_col, ... x=predictors, ... validation_frame=valid, ... training_frame=train) >>> gbm.confusion_matrix() # <- Default: return training metric value >>> gbm.confusion_matrix(train=True, valid=True, xval=True) """ return self._delegate_to_metrics('confusion_matrix', train, valid, xval, metrics=metrics, thresholds=thresholds)
[docs] def find_threshold_by_max_metric(self, metric, train=False, valid=False, xval=False): """ If all are ``False`` (default), then return the training metric value. If more than one option is set to ``True``, then return a dictionary of metrics where the keys are "train", "valid", and "xval". :param str metric: A metric among the metrics listed in :const:`H2OBinomialModelMetrics.maximizing_metrics`. :param bool train: If ``True``, return the find threshold by max metric value for the training data. :param bool valid: If ``True``, return the find threshold by max metric value for the validation data. :param bool xval: If ``True``, return the find threshold by max metric value for each of the cross-validated splits. :returns: The find threshold by max metric values for the specified key(s). :examples: >>> cars = h2o.import_file("https://s3.amazonaws.com/h2o-public-test-data/smalldata/junit/cars_20mpg.csv") >>> cars["economy_20mpg"] = cars["economy_20mpg"].asfactor() >>> r = cars[0].runif() >>> train = cars[r > .2] >>> valid = cars[r <=.2] >>> response_col = "economy_20mpg" >>> distribution = "bernoulli" >>> predictors = ["displacement", "power", "weight", ... "acceleration", "year"] >>> from h2o.estimators.gbm import H2OGradientBoostingEstimator >>> gbm = H2OGradientBoostingEstimator(nfolds=3, ... distribution=distribution, ... fold_assignment="Random") >>> gbm.train(y=response_col, ... x=predictors, ... validation_frame=valid, ... training_frame=train) >>> max_metric = gbm.find_threshold_by_max_metric(metric="f2", ... train=True) >>> max_metric """ return self._delegate_to_metrics('find_threshold_by_max_metric', train, valid, xval, metric=metric)
[docs] def find_idx_by_threshold(self, threshold, train=False, valid=False, xval=False): """ Retrieve the index in this metric's threshold list at which the given threshold is located. If all are ``False`` (default), then return the training metric value. If more than one option is set to ``True``, then return a dictionary of metrics where the keys are "train", "valid", and "xval". :param float threshold: Threshold value to search for in the threshold list. :param bool train: If ``True``, return the find idx by threshold value for the training data. :param bool valid: If ``True``, return the find idx by threshold value for the validation data. :param bool xval: If ``True``, return the find idx by threshold value for each of the cross-validated splits. :returns: The find idx by threshold values for the specified key(s). :examples: >>> cars = h2o.import_file("https://s3.amazonaws.com/h2o-public-test-data/smalldata/junit/cars_20mpg.csv") >>> cars["economy_20mpg"] = cars["economy_20mpg"].asfactor() >>> r = cars[0].runif() >>> train = cars[r > .2] >>> valid = cars[r <=.2] >>> response_col = "economy_20mpg" >>> distribution = "bernoulli" >>> predictors = ["displacement", "power", "weight", ... "acceleration", "year"] >>> from h2o.estimators.gbm import H2OGradientBoostingEstimator >>> gbm = H2OGradientBoostingEstimator(nfolds=3, ... distribution=distribution, ... fold_assignment="Random") >>> gbm.train(y=response_col, ... x=predictors, ... validation_frame=valid, ... training_frame=train) >>> idx_threshold = gbm.find_idx_by_threshold(threshold=0.39438, ... train=True) >>> idx_threshold """ return self._delegate_to_metrics('find_idx_by_threshold', train, valid, xval, threshold=threshold)
def _delegate_to_metrics(self, method, train=False, valid=False, xval=False, **kwargs): tm = ModelBase._get_metrics(self, train, valid, xval) m = {} for k, v in viewitems(tm): if v is None: m[k] = None elif hasattr(v, method) and callable(getattr(v, method)): m[k] = getattr(v, method)(**kwargs) else: raise ValueError('no method {} in {}'.format(method, type(v))) return list(m.values())[0] if len(m) == 1 else m