Suppose I am given an mXn matrix A, and I have a permutation of {1,…,m}, for example by p = sortperm(A[:,1]); I now wish to rearrange the wors of A based on p. How do I do that ? The permute!() function only applies to vectors, as shown here . I can always loop over the columns, as in for j in 1:…

[image] iamsuddhasattwa: But there is no way anyone can possibly understand from the documentation alone that lt=(x,y)->isless(x[2],y[2])) is supposed to mean ``by second column". You can also write sortslices(A, dims=1, by=row->row[2]), although I agree it’s not super-obvious what’s going to…

Permuting the rows of a matrix based on given a given permutation

General Usage

stevengj Split this topic May 22, 2025, 12:08am 14

2 posts were split to a new topic: Constructing a permutation matrix

Topic		Replies	Views
Symmetrically permute a matrix General Usage question , linearalgebra , arrays	1	279	May 5, 2022
Is there a function to permute columns or rows of a matrix in place? General Usage	2	1193	May 25, 2022
Explain perm in permutedims General Usage	2	498	January 13, 2019
Permutedims does not reassign inputted matrix New to Julia	2	765	April 26, 2019
Swap cols/rows of a matrix General Usage matrix	15	7192	January 5, 2024

Permuting the rows of a matrix based on given a given permutation

Related topics