Error - ??? Improper assignment with rectangular empty matrix - using "for"
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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!
1 个评论
Oleg Komarov
2011-2-18
Not clear what you want, what are you actually trying to do?
采纳的回答
Matt Tearle
2011-2-18
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
2 个评论
Daniel
2011-2-21
Matt Tearle
2011-2-21
How do you mean, exactly? A and B both have n rows and you want to do this row-by-row? Or each row of A against every row of B?
更多回答（1 个）
Robert Cumming
2011-2-18
0 个投票
Have you tried stepping through your code in debug mode?
Objective: You want to find where each B is located in A - correct?
So for each B (not the min) find where it is in A, i.e.
find(A==B(i));
You should do checks to make sure you dont have duplicates (As that will fail in the above case)
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