How to do loop in the Workspace?

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Bruno
Bruno 2016-9-20
编辑： Andrei Bobrov 2016-9-20
I have four matrixes c1 c2 c3 c4 (each matrix is 45x9)in the workspace. I need to calculate the mean for each row in each matrix.
The code I tried does not work:
c = {c1, c2, c3, c4};
for j = 1:4
mean_c(j) = mean(c{j},2);
end

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采纳的回答

Stephen23
Stephen23 2016-9-20
编辑：Stephen23 2016-9-20
Method One: for loop:
c = {rand(45,9), rand(45,9), rand(45,9), rand(45,9)};
d = cell(size(c));
for k = 1:numel(c)
d{k} = mean(c{k},2);
end
Method Two: cellfun:
d = cellfun(@(m)mean(m,2),c,'UniformOutput',false);
Convert to numeric by simply using cell2mat:
>> cell2mat(d)
ans =
0.49524 0.40269 0.65561 0.47278
0.59244 0.52532 0.41187 0.42431
0.34457 0.58936 0.54098 0.55274
0.52958 0.62364 0.50265 0.52148
0.70699 0.65555 0.58959 0.48702
0.38250 0.34663 0.54874 0.48712
0.59373 0.44404 0.62564 0.39276
0.48016 0.59843 0.57385 0.48644
0.49235 0.52315 0.52946 0.53855
0.51168 0.69419 0.46208 0.35696
0.53927 0.46378 0.48168 0.49156
etc

更多回答（2 个）

Andrei Bobrov
Andrei Bobrov 2016-9-20
编辑：Andrei Bobrov 2016-9-20
C = cat(1,c1,c2,c3,c4);
d = reshape(mean(C,2),size(c1,1),[]);
or
C = cat(1,c{:});
d = reshape(mean(C,2),size(c1,1),[]);
KSSV
KSSV 2016-9-20
编辑：KSSV 2016-9-20
clc;close all;clear all;
% Take some random data for c1,c2,c3,c4
c1 = rand(45,9) ;
c2 = rand(45,9) ;
c3 = rand(45,9) ;
c4 = rand(45,9) ;
c{1} = c1 ;
c{2} = c2 ;
c{3} = c3 ;
c{4} = c4 ;
mean_c = zeros(45,4) ; % initialize the mean for each ci
for j = 1:4
mean_c(:,j) = mean(c{j},2);
end

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