[R] Is there any R function for data normalization?

[Rui Barradas]

Hello,

Try the following.

fun <- function(x){
     a <- min(x)
     b <- max(x)
     (x - a)/(b - a)
}

mat <- matrix(rnorm(12), ncol=3)
apply(mat, 2, fun)

Hope this helps,

Rui Barradas
Em 02-10-2012 10:51, Rui Esteves escreveu:
> Hello,
>
> I have a matrix with values, with columns c1..cn.
> I need the values to be normalized between 0 and 1 by column.
> Therefor, the 0 should correspond to the minimum value in the column c1 and
> 1 should correspond to the maximum value in the column c1.
> The remaining columns should be organized in the same way.
>
> Does a function in R exists for this purpose?
>
> Thanks,
> Rui
>
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