How to find the maximum value among values less than a certain value?

I have a 10x10 cell maxtrix.

[maximumValue, index] = max([cell_matrix{:}]);

I found the max value using the above code.

But I want to find the maximum value of any value below a certain value, but I do not know what to do.

Answer 1

[madhan ravi]

idx = matrix < 100;  %100 is your certain value
%Numbers greater than 100
idx = matrix > 100;

Answer 2

[Andrei Bobrov]

A = cellfun(@(x)x(:),your_cell_array),'un',0);
A = sort(cat(1,A{:}));

out = A(find(A < certain_value,1,'last'));