MATLAB: How can I merge matrices

for loopmatrixvector

Z is a vector and X is a matrix
     for h = 1:length(Z)
          [D , E] = find(Z(h) == X)
     end
vector D and E overwrite in every loop. how can i conserve them in a vector?

Best Answer

Even better would be to avoid the loop entirely by using bsxfun:
>> F = [1,2,3]
F =
   1     2     3
>> B = [0,1;3,2;0,Inf;9,8]
B =
   0     1
   3     2
   0   Inf
   9     8
>> out = bsxfun(@eq,B,reshape(F,1,1,[]));
>> idx = find(out)
idx =
   5
  14
  18
And of course you can use ind2sub to get more specific index information:
>> [row,col,pag] = ind2sub(size(out),idx)
row =
   1
   2
   2
col =
   2
   2
   1
pag =
   1
   2
   3
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