dismember or intersect
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I have 2 cell arrays that have both double and characters in it. For plotting purposes, I'd like to create a 3rd array that is the size of the first array but only has the values of the second. Example:
a = {1 3 'tom';2 4 'dave'; 4 6 'mary'; 7 8 'daryl'}
b = {1 3 'tom'; 4 6 'marry'}
c = nan(size(a));
what can I do to get c to look like:
1 3 'tom'
nan nan nan
4 6 'mary'
nan nan nan
I know with an array of all numbers I could do something like: a = cell2mat(a); b = cell2mat(b); c = nan(size(a)); is = dismember(a, b); z(is) = a(is);
how can I do the same thing with strings in the array?
Thanks for your help
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Geoff
2012년 4월 4일
By the way, typo on your definition of b. I assume (by your value for c) that you meant 'mary', not 'marry'.
답변 (1개)
Geoff
2012년 4월 4일
You can still use ismember on the 3rd column:
memb3 = ismember(a(:,3),b(:,3));
And a dirty little number on the other two:
memb12 = all(ismember(cell2mat(a(:,1:2)), cell2mat(b(:,1:2))),2);
Then:
is = memb12 & memb3;
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Geoff
2012년 4월 4일
Did you use my code exactly as written? The '2' in the call to 'all' is important. You should end up with memb12 and memb3 being both row-vectors. Then to get 'c' you do:
c = a(is,:);
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