Replacing elements in Array

I have two 48 x 61 matrices, LE and Q. If the first and last row value of LE are the same, for those rows, I want the values of Q to equal Q(:, 61).

This is what I initially wrote, but am getting an error message.

C = find(LE(:,1) == LE(:,61)); % Outputs rows in which first and last values are equivalent.

Q(C,:) = Q(C, 61); % For all values in rows C, make every value in that row (of Q) the last value in row Q.

Error: subscript assignment dimension mismatch.

Any suggestions? Thanks!

[Image Analyst]

It's always nice if the poster supplies some sample data in advance to make it easy for people to try things for her. I mean, why make it hard for people to help you?

Answer 1

[Jan]

Q(C, :) = repmat(Q(C, 61), 1, size(Q, 2));

Answer 2

[Albert Yam]

When length(C) > 1 , Matlab doesn't know how to replace the values.

(length(C) x 61)  matrix , and a length(C) vector

If you loop it for every C, it should work, someone else might be able to point out a way without looping.

C = find(LE(:,1) == LE(:,61));
for ii=1:length(C)
    Q(C(ii),:) = Q(C(ii), 61);
end