Error ' Assignment has more non-singleton rhs dimensions than non-singleton..'

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Ede gerlderlands 2013-6-13

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https://ww2.mathworks.cn/matlabcentral/answers/78950-error-assignment-has-more-non-singleton-rhs-dimensions-than-non-singleton

I want to find the location of maximum 'EC' in the first direction. Here is the code I used to find so.

 for ii=1:size(EC,2);
   ss(1,ii,:)=max(EC(:,ii,:),[],1);
   loc(1,ii,:) = find(EC(:,ii,:) == ss(1,ii,:));
 end

but an error ' Assignment has more non-singleton rhs dimensions than non-singleton subscripts' keeps coming. Can anyone tell me what to do with it?

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Walter Roberson 2013-6-13

Does it occur on the max() or on the find() ?

You have not indicated whether the array is 2D or more. If it is 2D then EC(:,ii,:) would be the same as EC(:,ii) and then max() of that would be a scalar and could be stored in a scalar ss(1,ii,:). Then in the find(), EC(:,ii,:) would be EC(:,ii) a vector, and that could be tested against the scalar ss(1,ii) giving a vector result for the "==". find() on that vector result could result in a scalar (if the max was unique) or could result in a vector (if there were multiple copies of the maximum.)

If, though, EC has more than 2 dimensions, then max(EC(:,ii,:),[],1) would return an array whose first two dimension were and whose third dimension is the product of the remaining dimensions after the second. e.g., if EC was 2 x 3 x 4 x 5 then the max() would be 1 x 1 x (4*5). As this would be a vector, you would be able to store it into ss(1,ii,:). But then in the find(), EC(:,ii,:) would be size(EC,1) by 1 by the product of the dimensions after the second, and you would not be able to "==" that against the vector ss(1,ii,:) unless the first dimension of EC happened to be 1.