How to find the sum of each element of a matrix?

I have a binary image with some pixel values 1 and rest 0...I want to find out the sum of all the pixel values in the image...can any one help?

Answer 1

[dpb]

If x is the array,

xsum=sum(x(:));  % ":" is a Matlab idiom that returns all elements in a column vector

[peyush]

sorry but ...I need to find the sum of all elements of a 2-D MATRIX not for an array

[Image Analyst]

That will work regardless of how many dimensions x has. By the way, a matrix is an array.

[peyush]

thanks both of you :-)