h2o.grep: Search for matches to an argument pattern

In h2o: R Interface for the 'H2O' Scalable Machine Learning Platform

Search for matches to an argument pattern

Description

Searches for matches to argument 'pattern' within each element of a string column.

Usage

h2o.grep(
  pattern,
  x,
  ignore.case = FALSE,
  invert = FALSE,
  output.logical = FALSE
)

Arguments

pattern	A character string containing a regular expression.
x	An H2O frame that wraps a single string column.
ignore.case	If TRUE case is ignored during matching.
invert	Identify elements that do not match the pattern.
output.logical	If TRUE returns logical vector of indicators instead of list of matching positions

Details

This function has similar semantics as R's native grep function and it supports a subset of its parameters. Default behavior is to return indices of the elements matching the pattern. Parameter 'output.logical' can be used to return a logical vector indicating if the element matches the pattern (1) or not (0).

Value

H2OFrame holding the matching positions or a logical vector if 'output.logical' is enabled.

Examples

## Not run: 
library(h2o)
h2o.init()
addresses <- as.h2o(c("2307", "Leghorn St", "Mountain View", "CA", "94043"))
zip_codes <- addresses[h2o.grep("[0-9]{5}", addresses, output.logical = TRUE),]

## End(Not run)

h2o documentation built on May 29, 2024, 4:26 a.m.