reduce matrix
one way is the following: A <- rbind(c(1,0,0,3), c(0,1,2,0), c(0,0,3,5)) t(apply(A, 1, function (x) x[x != 0])) I hope it helps. Best, Dimitris
lloyd barcza wrote:
I am trying to reduce the dimension of matrix by removing zero elements and creating a sub-matrix. For example: A= [1,0,0,3; 0,1,2,0; 0,0,3,5] then the new matrix B would be: B= [1,3;1,2;3,5] There are the same number of zero elements in each row of A so dimension of B will not be a problem. Is there a straightforward way to do this in R without writing a function using loops etc? Any help or suggestions would be appreciated! Thanks
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Dimitris Rizopoulos Assistant Professor Department of Biostatistics Erasmus University Medical Center Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands Tel: +31/(0)10/7043478 Fax: +31/(0)10/7043014