standcol: Standardise the columns of a matrix
In tpepler/theolib: Collection of Auxiliary Functions

Description Usage Arguments Value Author(s) Examples

Enables the centering and scaling of the columns of a matrix, to have zero mean and unit variance.

1	standcol(x, centre = FALSE, stand = TRUE)

`x`	Matrix to be centred and/or scaled.
`centre`	Should the columns of `x` be centred to have zero mean? (TRUE/FALSE)
`stand`	Should the columns of `x` be scaled to have unit variance? (TRUE/FALSE)

Returns matrix x with the columns centred and/or scaled.

Theo Pepler

##---- Should be DIRECTLY executable !! ----
##-- ==>  Define data, use random,
##--	or do  help(data=index)  for the standard data sets.

## The function is currently defined as
function (x, centre = FALSE, stand = TRUE)
{
    if (centre) {
        for (i in 1:ncol(x)) {
            x[, i] <- x[, i] - mean(x[, i])
        }
    }
    if (stand) {
        for (i in 1:ncol(x)) {
            x[, i] <- x[, i]/sd(x[, i])
        }
    }
    return(x)
  }