Re: [R] How to select one value per row (different columns) from array

Thank you very much indeed. PD's code is exactly what I was looking for, and unfortunately it is so obvious, that I could kick myself for not thinking of it in the first place, as I feared would happen. WM: thanks for the additional suggestion. I'll check it in detail to see how my codes can

Re: [R] How to select one value per row (different columns) from array

Hello Wolfgang, Building on Peter Dalgaard's code, are you just trying to take a sample of a random column from each row? You don't need to use apply: > array[cbind(1:nrow(array), sample.int(ncol(array), nrow(array), replace=TRUE ))] Just a general note, since you're sampling one-column-per-row

Re: [R] How to select one value per row (different columns) from array

array[cbind(1:999,vector)] -pd On 01 Mar 2017, at 14:28 , Wolfgang Waser wrote: > Dear all, > > I have to pick one value per row from an array, but from row to row from > a different column. The column positions of the values for each row are > stored in a vector.

[R] How to select one value per row (different columns) from array

Dear all, I have to pick one value per row from an array, but from row to row from a different column. The column positions of the values for each row are stored in a vector. array: 999 rows, 48 columns vector: 999 values (each between 1 and 48) indicating for each row which value to pick from