Indexing of cell array using cellfun
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I have a cell array (10x1) where each cell is a numeric array (Mx2) and a vector with key indicies.
%Example [Code formatting SCd]
C=cell(10,1)
C{1}=rand(4,2)*10
C{2}=rand(5,2)*10...C{10}=rand(3,2)*10
V=1:10
I want to extract from C{1} the first element in V(1) C{2} the 2nd element of V(2)....
my initial thought was something like this, which of course doesn't work but...
out=cellfun(@(x) x(v(x),:),C, 'uniformoutput',false)
any suggestions on how do do this outside of a loop?
Thank You!
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Answers (3)
Sean de Wolski
on 19 Oct 2011
C = mat2cell(rand(100,2),ones(1,10)*10,2);
V = randperm(10).';
out = cellfun(@(c,idx)c(idx,:),C,num2cell(V))
perhaps?
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Jason Schroder
on 19 Oct 2011
1 Comment
Sean de Wolski
on 19 Oct 2011
that's what it is now that I made the edit. Basically it takes two 10x1 cells and does the same thing to each row of cells:
so
C(1)then the V(1) or V(1,:) parts etc.
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