sweep {base}

R Documentation

Sweep out Array Summaries

Description

Return an array obtained from an input array by sweeping out a summary statistic.

Usage

sweep(x, MARGIN, STATS, FUN="-", ...)

Arguments

x	an array.
MARGIN	a vector of indices giving the extents of x which correspond to STATS.
STATS	the summary statistic which is to be swept out.
FUN	the function to be used to carry out the sweep. In the case of binary operators such as "/" etc., the function name must be quoted.
...	optional arguments to FUN.

Value

An array with the same shape as x, but with the summary statistics swept out.

See Also

apply on which sweep is based; scale for centering and scaling.

Examples

data(attitude)
med.att <- apply(attitude, 2, median)
sweep(data.matrix(attitude), 2, med.att)# subtract the column medians

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