Extracting rows from a matrix based on values in columns
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What if I have more than 1 column? That is, I want A to be a 6-by-4 matrix for example, so to have C{1} = 4-by-3 matrix?
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Accepted Answer
Guillaume
on 8 Oct 2017
It's much easier to do this with the newer splitapply rather than the older accumarray:
A = [[1;1;3;2;3;1], rand(6, 3)]
C = splitapply(@(rows) {rows}, A(:, 2:end), A(:, 1))
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More Answers (1)
Kaushik Lakshminarasimhan
on 8 Oct 2017
for n=2:4, C_temp(:,n-1) = accumarray(A(:,1),A(:,n),[],@(n){n}); end
for m=1:size(C_temp,1), C{m} = cell2mat(C_temp(m,:)); end
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