mean of elements of a matrix

I have a matrix A. I want to take an average of all elements of A. Please advise.

Answer 1

[David Fletcher]

mean(A(:))

Gives the mean of the entire matrix

Answer 2

[Rana Hamza]

Take average as the mean of whole matrix

Answer 3

[Image Analyst]

theAverage = mean(A, 'all')
% or
theAverage = mean2(A) % In the Image Processing Toolbox.