how can i write a code that show replacing the values in the combined matrix (m1m2) that are greater than n1 with c1, and those that are less than or equal to n1 with c2?

thank you very much

[Jan]

The question is not clear. A small example would reduce the need to guess, what you mean. E.g. what is "a combine matrix (m1m2)"?

Answer 1

[Jan]

Perhaps you mean something like this:

X = rand(3,4);  % Test data
match     = X > n1;
X(match)  = c1;
X(~match) = c2;

Another method:

pool = [c1, c2];
Y    = pool((X > n1) + 1)

[jason nguyen]

Thank you so much Jan!!!