How can I permute the matrix block?

Says I now have a 400x400 matrix A, and want to permute the middle 80x80 part, which I need to divide into 16 blocks of each size 20x20 like figure below and re-arrange the order of the blocks like the vector V=[7;11;3;14.....]. Means I need to replace block 1 by block 7, replace block 2 by block 11, replace block 3 by block 3 like the order in vector V. Can any one tell me how can I achieve this? As I don't know how to make the blocks and change order, thank you.

Answer 1

[Image Analyst]

Try using blockproc() and randperm(). I've attached demos to help you.

[Yuxing Zhang]

thank you