array of mean from array

hi

I have a 400x400 array, and I need a new array for example a 10:10 in which the first value is the average of the first (0:40,0:40) values of the original array ... the 2:1 value is an average of the values from (41: 80,0:40) and so on until the las 10:10 values that will be the average (360:400,360:400)

I hope is clear

I can do one by one but i try to put this in a for

any sugestion please

Answer 1

[Fangjun Jiang]

a=rand(400);
b=mat2cell(a,40*ones(10,1),40*ones(1,10));
c=cellfun(@mean,b,'uni',false);
d=cellfun(@mean,c,'uni',false);
e=cell2mat(d)

Answer 2

[KALYAN ACHARJYA]

One line with blockproc

data=magic(400);
result_mean=blockproc(data, [40 40], @(x) mean(x.data(:)));