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

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Matlab2010
Matlab2010 2013-11-26
回答： Sean de Wolski 2013-11-26
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

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回答（2 个）

Azzi Abdelmalek
Azzi Abdelmalek 2013-11-26
编辑：Azzi Abdelmalek 2013-11-26
data(IDY)
Or maybe
data(IDY,:)
Sean de Wolski
Sean de Wolski 2013-11-26
data(IDY,:)
To reorder all rows or for columns
data(:,IDY)

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