MATLAB Central Newsreader - even values

even values

remi — Thu, 25 Jun 2009 16:08:02 -0400

Hello all,...Please if i have a matix and i want to find out the amount of even coefficients it contains..
ie
B= [1 4 8 0 9 5
7 2 6 1 2 4
9 2 0 3 0 6]
i want to be able to count out that there are 8 even values of of the 18 values.
Thanks

Re: even values

us — Thu, 25 Jun 2009 16:13:01 -0400

"remi " <obiosiki@yahoo.com> wrote in message <h207d1$ml6$1@fred.mathworks.com>...
> Hello all,...Please if i have a matix and i want to find out the amount of even coefficients it contains..
> ie
> B= [1 4 8 0 9 5
> 7 2 6 1 2 4
> 9 2 0 3 0 6]
> i want to be able to count out that there are 8 even values of of the 18 values.
> Thanks

this FEX submission may be helpful...

http://www.mathworks.com/matlabcentral/fileexchange/24278

us

Re: even values

Nathan — Thu, 25 Jun 2009 16:18:10 -0400

On Jun 25, 9:08 am, "remi " <obios...@yahoo.com> wrote:
> Hello all,...Please if i have a matix and i want to find out the amount of even coefficients it contains..
> ie
> B= [1 4 8 0 9 5
> 7 2 6 1 2 4
> 9 2 0 3 0 6]
> i want to be able to count out that there are 8 even values of of the 18 values.
> Thanks

You do know that Zero is an even number, right?
Therefore.. that would be 11 even values...
%total elements minus odd elements
B = numel(B) - numel(find(mod(B,2)));

B will be the number of even elements.

Hope that's what you were looking for.

However, if you want Zero to not be counted, just set the zero values
to an odd number first:
B(find(B==0)) = 1;
and THEN do:
B = numel(B) - numel(find(mod(B,2)));

-Nathan