loop-free numeric array indexing when numeric array inside cell array
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My objective is to apply a given function "myfun" to each column within a cell array, using an index vector. I provide an example to be more clear:
C = cell of size(C) = [M, 1];
Each row of C contains an array of the same size. I will call the "k_th" array A_k so that C{k,1} = A_k.
ind = a cell array the same size as C, containing integers.
icol = an array of integer shift values where size(icol) = [size(A_k,2), 1];
Goal: Shift a certain columns ind{k}, in each A_k contained within C by an amount specified by vector icol( : , ind{k} ) WITHOUT the following loop:
for k = 1:size(C,1),
this{k} = circshift( C{ k , 1}, icol( : , ind{k} ) );
end;
I often use "cellfun" or "arrayfun" to operate on arrays, but this seems harder. Thank you in advance.
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Accepted Answer
Geoff
on 15 Mar 2012
You can use cellfun for this if you combine the C and ind cell arrays: ie chuck the ind array as a new column in C.
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