How to count how many numbers are odd or even?

a = 3
r = 2
n = 0:5

g=0;
for n=n
  g=g+(a*(r^n))
end
% How many numbers are even?
(rem(g,2)==0)
if ans==1('Even')
end
if ans==0('Odd')
end

I want the script to be able to count how many numbers are odd and how many are even, I don't need it to tell me if the numbers are odd or even I just want the number of how many are.

[Jan]

Do not use ans explicitly, because this is a very volatile variable.

Answer 1

[Walter Roberson]

Use two counters. Initialize them to 0. As you generate it number and test it for even or odd, add one to the appropriate counter.

Answer 2

[Kelly Kearney]

 nx = 100;
 x = randi(100,nx,1);  % Some example data
 neven = sum(~rem(x,2));
 nodd = nx - neven;

[Walter Roberson]

This can be shortened by one operation ;-)

[Kelly Kearney]

Okay then...

nodd = sum(rem(x,2));
neven = nx - nodd;

:-)

[Walter Roberson]

It would be interesting to compare the speed of nnz() to sum() for this case.