ft_string_indexer

An object (usually a <code>spark_tbl</code>) coercable to a Spark DataFrame.

input_col

output_col

An (optional) <span style="R">R</span> environment -- when available,
the index &lt;-> label mapping generated by the string indexer
will be injected into this environment under the <code>labels</code>
key.

params


Encode a column of labels into a column of label indices.
The indices are in [0, numLabels), ordered by label frequencies, with
the most frequent label assigned index 0. The transformation
can be reversed with <code><a rd-options="" href="/link/ft_index_to_string?package=sparklyr&version=0.2.27" data-mini-rdoc="sparklyr::ft_index_to_string">ft_index_to_string</a></code>.


Provision, connect and interface to Apache Spark from within R.
This package supports connecting to local and remote Apache Spark clusters,
provides a dplyr-compatible back-end, and provides an interface to Spark's
built-in machine learning algorithms.

Javier Luraschi

sparklyr

R Interface to Apache Spark

ft_string_indexer function

An (optional) <span style="R">R</span> environment -- when available,
the index <-> label mapping generated by the string indexer
will be injected into this environment under the <code>labels</code>
key.


Encode a column of labels into a column of label indices.
The indices are in [0, numLabels), ordered by label frequencies, with
the most frequent label assigned index 0. The transformation
can be reversed with <code><a rd-options='' href='ft_index_to_string'>ft_index_to_string</a></code>.


ft_string_indexer: Feature Transformation -- StringIndexer

Description

Usage

Arguments

See Also