Identify integers in a matrix

Task: Write a function sumDiv5 which receives one input argument and returns how many elements of the input variable are divisible by 5.

When I have a row vector I am able to calculate this, but when I input a matrix my answer does not display correctly, what is wrong with my code?

function output= sumDiv5 (numbers)
A= floor(rem(numbers,5));
count=sum(A==0);
output=count;

Example of what happens:

>> sumDiv5(4:9)

ans =

       1

>> sumDiv5([0 1 2 3 4; 2 5 8 13 15])

ans =

       1     1     0     0     1

>>

[Andrei Bobrov]

sumDiv5 = @(numbers)sum(rem(numbers(:),5)==0)

Answer 1

[Image Analyst]

You were told how to do this in your duplicate question: http://www.mathworks.com/matlabcentral/answers/245287#comment_312443

You didn't use (:) like you were told, so it's not doing it on the whole 2D matrix but on each column one column at a time.