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dimension mismatch error

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chitra s
chitra s 2012-5-11
关闭： MATLAB Answer Bot 2021-8-20
clc;
clear all;
allsamples=[];
for i=1:6
tic
a=imread(strcat('C:\Users\user\Documents\MATLAB\face','\',num2str(i),'.jpg'));
imshow(a);
b=a(1:112*92);
b=double(b);
allsamples=[allsamples;b];
toc
end
samplemean=mean(allsamples);
xmean=zeros();
for i=1:200
xmean(i,:)=allsamples(i,:)-samplemean;
end
from the above program i got the error message as
??? Subscripted assignment dimension mismatch.
Error in ==> example1 at 16
xmean(i,:)=allsamples(i,:)-samplemean;
how to clear this error plz help me

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回答（1 个）

Andrei Bobrov
Andrei Bobrov 2012-5-11
pre-allocation:
xmean = zeros(200,size(allsamples,2));
OR:
xmean = bsxfun(@minus,allsamples(1:200,:),mean(allsamples));

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