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max.col sounds like what you're after. -- Hong Ooi Senior Research Analyst, IAG Limited 388 George St, Sydney NSW 2000 +61 (2) 9292 1566 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of bunny , lautloscrew.com Sent: Thursday, 8 March 2007 9:12 AM To: r-help@stat.math.ethz.ch Subject: [R] hwo can i get a vector that... dear all, how can i get a vector that shows the number of the column of matrix that contains the maximum of the row ?? canĀ“t believe in need a loop for this... i have a 100 x 3 matrix and want to get a 100 x 1 vector with values 1,2,3 . there must be a simple solution. i just cannot find it. i think am searching on the wrong end. thx for help in advance. m. ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. _______________________________________________________________________________________ The information transmitted in this message and its attachme...{{dropped}} ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.