search for a code in a cell

I want to find whether code [1 1 -1 -1] is present in a cell C in which C{1}=[1 1 1 1],C{2}=[1 1 -1 -1],C{3}=[1 -1 1 -1],C{4}=[1 -1 -1 1]. Also find out what is the location of the code.

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Evan
Evan 2015-2-18
编辑:Evan 2015-2-18
key = [1 1 -1 -1]
C{1} = [1 1 1 1];C{2}=[1 1 -1 -1];C{3}=[1 -1 1 -1];C{4}=[1 -1 -1 1]
loc = find(cellfun(@(x)all(x == key),C));
You could also do this with a for loop, checking each cell of C one iteration at a time. cellfun effectively does this.

4 个评论

thankyou sir. Also sir, what should I do if I want to search for a) [1 1] in C b) [1 1 -1 -1 1 1 -1 -1] is containing elements which is a part of C
Stephen23
Stephen23 2015-2-18
编辑:Stephen23 2015-2-18
Try using strfind (yes, it also works on numeric arrays!).
when i'm using strfind, there is an error showing as "If any of the input arguments are cell arrays, the first must be a cell array of strings and the second must be a character array." i'm using mat2cell([1 1 -1 -1]) and then comparing with C
strfind works on numeric arrays, and not on cell arrays containing numeric arrays. Try it with a simple numeric vectors first to see how it works. Although you have already accepted Evan's answer, this might be more what you are wanting:
cellfun(@(c)strfind(c,key), C)
Or if there might be multiple matches / non-matched entries:
cellfun(@(c)strfind(c,key), C, 'UniformOutput',false)

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