[R] Automatic routine - help
Uwe Ligges
ligges at statistik.uni-dortmund.de
Wed Jun 23 11:14:42 CEST 2004
Monica Palaseanu-Lovejoy wrote:
> Hi,
>
> I would like to write a little automatic routine in R, but i am a too
> much of a beginner for that. I will appreciate any help regarding this
> particular problem.
>
> Let’s suppose I have a data.frame with j columns (from 1 to n) and i
> rows (from 1 to p). I would like to write a procedure which reads
> every column j (j from 1 to n) and compare each value with the
> interval [0,1]. If z(i,j) is less than 0, then replace z(i,j) with 0. If z(i,j)
> is greater than 1, then replace z(i,j) with 1. If z(i,j) is inside the
> interval [0,1] then don’t change. In the end I would like to have a
> new data.frame with the new values.
>
> I am not sure how complicated or long such a procedure might be,
> so I will be very grateful for any help.
>
> Thank you in advance,
>
> Monica
If all columns of your data.frame are numeric:
z[z<0] <- 0
z[z>1] <- 1
Uwe Ligges
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