[R] More elegant multiplication or division of a data frame with a vector

[Gabor Grothendieck]

Not sure if these are any better but here are a few alternatives:

rawdata / rep(sens, each = nrow(rawdata))

as.data.frame(mapply("/", rawdata, sens))

as.data.frame(as.matrix(rawdata) %*% diag(1/sens))

On Sat, Mar 22, 2008 at 10:21 AM, Tribo Laboy <tribolaboy at gmail.com> wrote:
> Hello,
>
> I am importing some raw voltage multichannel measurements into an R
> data frame. I need to scale each column with the respective
> sensitivity for that channel. I figured how to do it, but I am curious
> if there isn't a more elegant way.
>
> Now I start with something like this:
>
> rawdata <- data.frame(rbind(c(1,2,3), c(4,5,6)))
> sens <- c(2,4,6)
>
>
> and I do this:
> data <- as.data.frame(t(t(rawdata)/sens))
>
> Any suggestions?
>
> Cheers,
>
> TL
>
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