sub2ind.m -- trying to use with a 2D matrix

I have a matrix

data = rand(100,100);

I also have a index into that matrix

IDY = randperm(100);

I wish to reorder the data matrix by the order in IDY.

I thought sub2ind could help me, but I have not been able to get it working.

FYI: the matrix is a correlation matrix. Each element refers to a variable. I wish to "re-order" the correlation matrix according to the ordering in IDY.

thank you

Answer 1

[Azzi Abdelmalek]

data(IDY)

Or maybe

data(IDY,:)

Answer 2

[Sean de Wolski]

data(IDY,:)

To reorder all rows or for columns

data(:,IDY)