Thanks for your help everyone,
My data is a matrix. However if i use the command:
x[(x[,20] > 315 | x[,20] < 45), ]
and then request a summary, I get a warning message saying that a large number of the row names have been duplicated - I don't understand this?
If x is the original matrix, and subx is the subseted matrix (x[(x[,20] > 315 | x[,20] < 45), ]) ...
Do you get this warning message when you type summary(x)?
If you're not explicitly using the rownames for anything other than labeling, it can be safely ignored. Duplicate rownames are a bit strange to R, but they're not illegal in matricies.
Cheers
Jason -- Indigo Industrial Controls Ltd. http://www.indigoindustrial.co.nz 64-21-343-545 [EMAIL PROTECTED]
______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
