find structure

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?

[Fangjun Jiang]

What is your structure A and B? Does it come from dir()?

[per isakson]

Do you mean "fields" rather than "files"? If so try setdiff( fieldnames(A),fieldnames(B) )

[joseph Frank]

A and B come from dir( )

A = dir('ret*.mat');

Answer 1

[Fangjun Jiang]

setdiff({A.name},{B.name})