hex.gram

Class Gram.GramTask

java.lang.Object

jsr166y.ForkJoinTask<java.lang.Void>

jsr166y.CountedCompleter

water.H2O.H2OCountedCompleter

water.DTask

water.MRTask2<T>

hex.FrameTask<Gram.GramTask>

hex.gram.Gram.GramTask

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.util.concurrent.Future<java.lang.Void>, jsr166y.ForkJoinPool.ManagedBlocker, Freezable

Enclosing class:

Gram

public static class Gram.GramTask
extends FrameTask<Gram.GramTask>

Task to compute gram matrix normalized by the number of observations (not counting rows with NAs). in R's notation g = t(X)%*%X/nobs, nobs = number of rows of X with no NA.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class hex.FrameTask

FrameTask.DataInfo

Field Summary

Fields

Modifier and Type	Field and Description
Gram	_gram
boolean	_hasIntercept
boolean	_isWeighted
long	_nobs
double[][]	_XY

Fields inherited from class hex.FrameTask

_dinfo, _shuffle, _useFraction

Fields inherited from class water.MRTask2

_appendables, _fr, _fs, _hi, _left, _lo, _nleft, _nodes, _nrite, _rite, _topLocal

Fields inherited from class water.DTask

_cls, _eFromNode, _exception, _fname, _lineNum, _msg, _mth

Constructor Summary

Constructors

Constructor and Description
Gram.GramTask(Job job, FrameTask.DataInfo dinfo, boolean hasIntercept, boolean isWeighted)

Method Summary

Methods

Modifier and Type	Method and Description
protected void	chunkDone() Override this to do post-chunk processing work.
protected void	chunkInit() Override this to initialize at the beginning of chunk processing.
protected void	processRow(long gid, double[] nums, int ncats, int[] cats, double[] responses) Method to process one row of the data for GLM functions.
void	reduce(Gram.GramTask gt) Override to combine results from 'mrt' into 'this' MRTask2.

Methods inherited from class hex.FrameTask

dfork, map, normMul, normRespMul, normRespSub, normSub, processRow

Methods inherited from class water.MRTask2

block, clone, closeLocal, compute2, dfork, dfork, dfork, dinvoke, doAll, doAll, doAll, doAll, doAll, doAll, getResult, isReleasable, map, map, map, map, map, map, map, map, map, map, map, onCompletion, onExceptionalCompletion, outputFrame, outputFrame, outputFrame, postGlobal, profString, reduce4, setupLocal, vecs

Methods inherited from class water.DTask

copyOver, frozenType, getDException, hasException, logVerbose, newInstance, onAck, onAckAck, read, setException, toDocField, write, writeJSONFields

Methods inherited from class water.H2O.H2OCountedCompleter

compute, priority

Methods inherited from class jsr166y.CountedCompleter

addToPendingCount, compareAndSetPendingCount, complete, exec, getCompleter, getPendingCount, getRawResult, setCompleter, setPendingCount, setRawResult, tryComplete

Methods inherited from class jsr166y.ForkJoinTask

adapt, adapt, adapt, cancel, compareAndSetForkJoinTaskTag, completeExceptionally, fork, get, get, getException, getForkJoinTaskTag, getPool, getQueuedTaskCount, getSurplusQueuedTaskCount, helpQuiesce, inForkJoinPool, invoke, invokeAll, invokeAll, invokeAll, isCancelled, isCompletedAbnormally, isCompletedNormally, isDone, join, peekNextLocalTask, pollNextLocalTask, pollTask, quietlyComplete, quietlyInvoke, quietlyJoin, reinitialize, setForkJoinTaskTag, tryUnfork

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

_gram

public Gram _gram

_XY

public double[][] _XY

_nobs

public long _nobs

_hasIntercept

public final boolean _hasIntercept

_isWeighted

public final boolean _isWeighted

Constructor Detail

Gram.GramTask

public Gram.GramTask(Job job,
             FrameTask.DataInfo dinfo,
             boolean hasIntercept,
             boolean isWeighted)

Method Detail

chunkInit

protected void chunkInit()

Description copied from class: FrameTask

Override this to initialize at the beginning of chunk processing.

Overrides:

chunkInit in class FrameTask<Gram.GramTask>

processRow

protected void processRow(long gid,
              double[] nums,
              int ncats,
              int[] cats,
              double[] responses)

Description copied from class: FrameTask

Method to process one row of the data for GLM functions. Numeric and categorical values are passed separately, as is response. Categoricals are passed as absolute indexes into the expanded beta vector, 0-levels are skipped (so the number of passed categoricals will not be the same for every row). Categorical expansion/indexing: Categoricals are placed in the beginning of the beta vector. Each cat variable with n levels is expanded into n-1 independent binary variables. Indexes in cats[] will point to the appropriate coefficient in the beta vector, so e.g. assume we have 2 categorical columns both with values A,B,C, then the following rows will have following indexes: A,A - ncats = 0, we do not pass any categorical here A,B - ncats = 1, indexes = [2] B,B - ncats = 2, indexes = [0,2] and so on

Overrides:

processRow in class FrameTask<Gram.GramTask>

Parameters:

gid - - global id of this row, in [0,_adaptedFrame.numRows())

nums - - numeric values of this row

ncats - - number of passed (non-zero) categoricals

cats - - indexes of categoricals into the expanded beta-vector.

responses - - numeric value for the response

chunkDone

protected void chunkDone()

Description copied from class: FrameTask

Override this to do post-chunk processing work.

Overrides:

chunkDone in class FrameTask<Gram.GramTask>

reduce

public void reduce(Gram.GramTask gt)

Description copied from class: MRTask2

Override to combine results from 'mrt' into 'this' MRTask2. Both 'this' and 'mrt' are guaranteed to either have map() run on them, or be the results of a prior reduce(). Reduce is optional if, e.g., the result is some output vector.

Overrides:

reduce in class MRTask2<Gram.GramTask>