MATLAB: How to find strings in an excel file

string-excel

I want to find all colons in an excel file

colons = findstr(char, ':');

colons shows up empty. why is that?

Thanks for your reply

Yes, I did.

I also tried

colons = findstr(string, ':');

Any idea of what could be wrong?

fctName = factors{i, 3}; %notice the {} instead of ()

Have you tested this? You are trying to join a cell array and a numerical matrix from what it seems.

output = [cell2mat(tri(:,1)),estrai]