What about a trivial FOR loop:
C = {rand(100, 1), rand(100, 1), rand(100, 1), rand(100, 1)};
value = 0.5;
row = cell(1, 3);
column = cell(1, 3);
for i = 1:3
[row{i}, column{i}] = find(C{1} == value);
end
This can be done by CELLFUN also, but I do not see an advantage.
Or you can create the numerical matrix explicitely and use logical indexing:
Match = find(cat(2, C{1:3}) == value);
Usually using the columns of the logical matrix Match is faster than using separate index vectors.
