calculate mean of a vector

i've an image of size 256 x 256

i've extracted one block from it, then i've convert the matrix to vector.

can anyone tell me how to calculate the mean of the vector.

 grayImage=rgb2gray(imread('misile.jpg'));
 grayImage=imresize(I,[256,256]);
 J= grayImage(1:128,1:128);
 vect=reshape(J.',1,numel(J));           % matrix to vector conversion

plz tell me how to calculate mean of a vector

Answer 1

[Andrei Bobrov]

out = mean(vect);