Calculate an image mean withouth the "mean" command

*To*: mathgroup at smc.vnet.net*Subject*: [mg123183] Calculate an image mean withouth the "mean" command*From*: sfalanzo <iwannasgheppa at hotmail.it>*Date*: Fri, 25 Nov 2011 04:58:18 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com

Hi at all, first, sorry for the bad english... i have to calculate the mean of an image without using the command "mean". with mean i resolve in this way: [code]a=imread('x.JPG'); [M,N]=size(a); %mask 5x5 for i=1:M-4 for j=1:N-4 c = a(i : i+4 , j : j+4); media5(i,j)=mean( c ( : ) ); end; end;[/code] the teacher says that shoul be used more for-cycle, but i have no idea about how implement it. Thanks in advance