On Sun, Nov 30, 2008 at 12:21 PM, Salas, Andria Kay <[EMAIL PROTECTED]> wrote:
> I am running a large for loop and at the end of each iteration a matrix is
> produced. The program changes the columns in the matrix, and each time a
> column is added the name of that column is "y". All original columns have no
> column name. Due to the nature of the program, all original columns will
> eventually be replaced with new columns each with the column name "y". It is
> at this point that I want the program to stop running the for loop (right now
> I just have it running for 20 iterations resulting in a matrix with a mix of
> old and new columns). I was thinking maybe I could do something with an if
> else statement and the command colnames. For example:
>
> If(colnames all are "y") (stop) else (run the program again)
Have a look at ?"while" :
while(!(colnames all are "y")) { run the program again }
Hadley
--
http://had.co.nz/
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