Find cell and return index

Hi everyone,

a = { {21 3 1}, {22 32 2}, {21 31 2}, {22 32 1} };

I would like to know the locations of the cells containing a specific value- {21 31 1}

In this case, it's 1.

I try to use like below:

Match = {21 31 1};

CorrectMatch = find (cellfun(@(x) isequal (x,Match), a(1,:)));

but it doesn't work out

Could any one help me?

[Walter Roberson]

Use a numeric vector for Match because cellfun will be passing in the content of the cells

Answer 1

[Image Analyst]

Your Match is not a pattern in your "a" so that's why it didn't find it. {21 31 1} is nowhere in a. If it still does not work and you want a simple, intuitive for loop, then try this:

a = { {21 3 1}, {22 32 2}, {21 31 2}, {22 32 1} };
% Define what we want to find
pattern = {21 3 1};
% Instantiate output vector of where matches were found.
matches = false(size(a));
for col = 1 : length(a)
	if isequal(a{col}, pattern)
		matches(col) = true;
	end
end
matches % Show matches in command window.