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

Decrease the observations in a task or a ResampleInstance to a given percentage of observations.

Usage

downsample(obj, perc = 1, stratify = FALSE)

Arguments

obj

(Task | ResampleInstance)
Input data or a ResampleInstance.

perc

(numeric(1))
Percentage from (0, 1). Default is 1.

stratify

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

Value

([data.frame| [Task] | [ResampleInstance]). Same type asobj`.

See also

makeResampleInstance

Other downsample: makeDownsampleWrapper()