[R] Automatic routine - help

Uwe Ligges
Wed, 23 Jun 2004 09:14:42 -0000

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