MATLAB: Matrix manipulation using strcmp

strcmp

Forgive me if this is a simple question that I should be able to answer myself, but I've been struggling with the proper use of this for a few days now. I'm a relatively novice MatLab user.

I have a 2xn matrix. The left column is made up of strings, the right values associated with those strings, like this

OL 4

WR 7

OL 3

AT 2

What I've been trying to do is use strcmp to pick a particular sring and then return its associated value in a new 2xm matrix consisting solely of the string (for example 'OL' and the values associated with each.

This seems like a simple problem, however, I'm stuck.

Thanks in advance for any help you can give me.

Best Answer

a = {'OL',4;'WR',7;'OL',3;'AT',2}
c=arrayfun(@(x) strcmp(x,'OL'),{a{:,1}});
d=a(c,2)

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Thank you for formerly accepting my answer

Greg

MATLAB: Strcmp help

Like Fangjun said, ismember(),intersect() or setdiff() may be useful.

% Make a cell array of 10 short strings
firstSet = cellstr(char(randi(26,10,4)+96));
% And a second array using some of the first set mixed with other randoms
secondSet = cat(1, firstSet([2,7,9]), cellstr(char(randi(26,10,4)+96)));
% Randomise the order of this second set
secondSet = secondSet(randperm(length(secondSet)));
% Find matches
[firstMatch, firstMatchLocs] = ismember(firstSet,secondSet);
cell2print = cat(1, firstSet(firstMatch)', num2cell([find(firstMatch)'; firstMatchLocs(firstMatch)']));
fprintf('(%s), found at first index %d matches second index %d\n', cell2print{:})
fprintf('The following firstSet entries did not match the secondSet:\n')
cell2print = cat(1, firstSet(~firstMatch)', num2cell(find(~firstMatch)'));
fprintf('(%s) at index %d\n', cell2print{:})

Best Answer

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