downsample

(<a rd-options="" href="/link/Task?package=mlr&version=2.13" data-mini-rdoc="mlr::Task">Task</a> | <a rd-options="" href="/link/ResampleInstance?package=mlr&version=2.13" data-mini-rdoc="mlr::ResampleInstance">ResampleInstance</a>)
Input data or a <code>ResampleInstance</code>.

(<code>numeric(1)</code>)
Percentage from (0, 1).
Default is 1.

perc

(<code>logical(1)</code>)
Only for classification:
Should the downsampled data be stratified according to the target classes?
Default is <code>FALSE</code>.

stratify

Decrease the observations in a <code>task</code> or a <code>ResampleInstance</code>
to a given percentage of observations.

Interface to a large number of classification and regression
techniques, including machine-readable parameter descriptions. There is
also an experimental extension for survival analysis, clustering and
general, example-specific cost-sensitive learning. Generic resampling,
including cross-validation, bootstrapping and subsampling. Hyperparameter
tuning with modern optimization techniques, for single- and multi-objective
problems. Filter and wrapper methods for feature selection. Extension of
basic learners with additional operations common in machine learning, also
allowing for easy nested resampling. Most operations can be parallelized.

Bernd Bischl

Machine Learning in R

Michel Lang

Lars Kotthoff

Julia Schiffner

Jakob Richter

Zachary Jones

Giuseppe Casalicchio

Mason Gallo

Patrick Schratz

Jakob Bossek

Erich Studerus

Leonard Judt

Tobias Kuehn

Pascal Kerschke

Florian Fendt

Philipp Probst

Xudong Sun

Janek Thomas

Bruno Vieira

Laura Beggel

Quay Au

Martin Binder

Florian Pfisterer

Stefan Coors

Steve Bronder

Alexander Engelhardt

Christoph Molnar

downsample function

(<a rd-options='' href='Task'>Task</a> | <a rd-options='' href='ResampleInstance'>ResampleInstance</a>)
Input data or a <code>ResampleInstance</code>.

Downsample (subsample) a task or a data.frame. — downsample

Downsample (subsample) a task or a data.frame.

downsample: Downsample (subsample) a task or a data.frame.

Description

Usage

Arguments

Value

See Also