array of mean from array

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Rodrigo Araya
Rodrigo Araya 2019-10-11
编辑： KALYAN ACHARJYA 2019-10-11
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

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采纳的回答

Fangjun Jiang
Fangjun Jiang 2019-10-11
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)

更多回答（1 个）

KALYAN ACHARJYA
KALYAN ACHARJYA 2019-10-11
编辑：KALYAN ACHARJYA 2019-10-11
One line with blockproc
data=magic(400);
result_mean=blockproc(data, [40 40], @(x) mean(x.data(:)));

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