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Find the index for min of a matrix
2 messages · kate, Bill Venables
W <- matrix(c(2,4,2,8,1,3), ncol = 3) which(W == min(W), arr.ind = TRUE) #### note difference...
row col [1,] 1 3
W # chech
[,1] [,2] [,3] [1,] 2 2 1 [2,] 4 8 3 Bill Venables CSIRO Laboratories PO Box 120, Cleveland, 4163 AUSTRALIA Office Phone (email preferred): +61 7 3826 7251 Fax (if absolutely necessary): +61 7 3826 7304 Mobile: +61 4 8819 4402 Home Phone: +61 7 3286 7700 mailto:Bill.Venables at csiro.au http://www.cmis.csiro.au/bill.venables/ -----Original Message----- From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of kate Sent: Monday, 31 March 2008 1:53 PM To: r-help at r-project.org Subject: [R] Find the index for min of a matrix Hi, My example is as the following, W<-matrix(c(2,4,2,8,1,3),ncol=3) which(W==min(W)) I would like to find the index for min of the matrix W, i.e. (1, 3) instead of 5 as the output. What command could I use? Thanks, Kate ______________________________________________ R-help at r-project.org 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.