Column-wise pooled variances across groups {Rfast2}

Column-wise pooled variances across groups

Description

Column-wise pooled variances across groups.

Usage

pooled.colVars(x, ina, std = FALSE)

Arguments

x

A matrix with the data.

ina

A numerical vector specifying the groups. If you have numerical values, do not put zeros, but 1, 2, 3 and so on.

std

A boolean variable specyfying whether you want the variances (FALSE) or the standard deviations (TRUE) of each column.

Details

This function cacluates the pooled variance (or standard deviation) for a range of groups for each column.

Value

A vector with the pooled column variances or standard deviations.

Author(s)

Michail Tsagris.

R implementation and documentation: Michail Tsagris [e-mail] and Manos Papadakis [e-mail].

See Also

colmeansvars

Examples

pooled.colVars( as.matrix(iris[, 1:4]), as.numeric(iris[, 5]) )