Importing Multiple FilesΒΆ
The importFolder
(R)/import_file
(Python) function can be used to import multiple files by specifying a directory and a pattern. Example patterns include:
pattern="/A/.*/iris_.*"
: Import all files that have the pattern/A/.*/iris_.*
in the specified directory.pattern="/A/iris_.*"
: Import all files that have the pattern/A/iris_.*
in the specified directory.pattern="/A/B/iris_.*"
: Import all files that have the pattern/A/B/iris_.*
in the specified directory.pattern="iris_.*"
: Import all files that have the patterniris_.*
in the specified directory.
Note: All files that are specified to be included must have the same number and set of columns.
# To import all .csv files from the prostate_folder directory:
> library(h2o)
> h2o.init(nthreads=-1)
> prosPath = system.file("extdata", "prostate_folder", package = "h2o")
> prostate_pattern.hex = h2o.importFolder(path = prosPath, pattern = ".*.csv", destination_frame = "prostate.hex")
> class(prostate_pattern.hex)
> summary(prostate_pattern.hex)
# To import all files in the iris folder matching the regex "iris_.*\.csv"
>>> import h2o
>>> h2o.init()
>>> iris_pattern = h2o.import_file(path = "../smalldata/iris",pattern = "iris_.*\.csv")