find structure

2011 9 20
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I have 2 structure vectors A and B. I want to find the files in A that are not in B I used x=find(~ismember(A,B)); I received an error : ??? Error using ==> double Conversion to double from struct is not possible.
Error in ==> ismember at 90 a = double(a);
How can I perform this task?

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Fangjun Jiang
Fangjun Jiang 2011-9-20
What is your structure A and B? Does it come from dir()?
per isakson
per isakson 2011-9-20
Do you mean "fields" rather than "files"? If so try setdiff( fieldnames(A),fieldnames(B) )
joseph Frank
joseph Frank 2011-9-21
A and B come from dir( )
A = dir('ret*.mat');

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