Hi, I need some help
I have a matrix M(m,n) in which each element is a vector V of lenght 6 1 2 3 4 5 6 7 1 List,6 List,6 List,6 List,6 List,6 List,6 List,6 2 List,6 List,6 List,6 List,6 List,6 List,6 List,6 3 List,6 List,6 List,6 List,6 List,6 List,6 List,6 4 List,6 List,6 List,6 List,6 List,6 List,6 List,6 i would like to make the sum on the matrix of each element of the matrix, that is to say sum(on the matrix)(M[j,][[j]][[1]]) sum(on the matrix)(M[j,][[j]][[2]]) ... sum(on the matrix)(M[j,][[j]][[6]]) I don't really know how to do. I thought it was possible to transform the matrix M into an array A of dimension (m,n,6), and then use the command sum(colsums(A[,,1]), which seems to be possible and quite fast. ...but I don't know how to convert a matrix of vector into an array.... As anyone any little idea about that ? Thanks by advance Jessica ______________________________________________ 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.
