MATLAB: Error – ??? Improper assignment with rectangular empty matrix – using “for”

arrayfor loopimproper assignment with rectangular empty matrixMATLAB

Hello,
I am attempting to run a script through several loops. However I keep receiving an error message no matter what I do to try and fix it. Please see below:
A=[1 3 4 2 5];
B=[1 2 3 4 5];
n=length(A);
Ind=ones(1,n);
for i=1:n
    Ind(i)=find(A<=min(B));
    A(Ind(i))=Inf;
end
Ind
Essentially I want to fill in the array "Ind" with the indices relating A and B. If successful the output from this particular code should be Ind=[1 4 2 3 5]. Unfortunately this error keeps appearing no matter what I try "??? Improper assignment with rectangular empty matrix." I would appreciate any assistance you could provide.
Thanks!

Best Answer

You can also use MATLAB set functions, under certain assumptions. In particular, if you expect both A & B to have exactly the same elements (but B is a permutation of A), then this will do the job:
if isempty(setdiff(A,B))
  [~,Ind] = intersect(A,B)
else
  error('A & B have different elements')
end
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