# [R] Converting factors to bounded random numerical data

Jeff Newmiller jdnewmil at dcn.davis.ca.us
Thu Oct 11 03:17:49 CEST 2012

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Sent from my phone. Please excuse my brevity.

KoopaTrooper <ncooper1 at tulane.edu> wrote:

>I have a data set (a) with three columns (X,Y,Z). The first 2 columns
>are
>numeric. The third (Z) is a factor with three levels A,B,C. I want to
>turn
>each A into a different random number between 1 and 4, each B into a
>different random number between 5 and 8, etc.
>
>I tried this:
>
>a\$Z<-ifelse(a\$Z=="L",sample(1:4,1),ifelse(a\$Z=="M",sample(5:9,1),ifelse(a\$Z=="U",sample(10:12,1),"")
>
>and it almost worked but changed all the "A's" into the same random
>number.
>I need a different random number for each A. Ideas?
>
>Thanks,
>
>
>
>--
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