finding the minimum value

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kash
kash 2012-5-10
I have a code performing inverse dualtree dwt
for j1 = 1:size(A1_20,3)
for j = 1:J
% loop thru subbands
for s1 = 1:2
for s2 = 1:3
w{j}{s1}{s2} =A1_20(:,:,j1);
y1 = idualtree2D(w, J, Fsf, sf);
Er= mean2((single(x) - single(y1)).^2);
final_col2{j1}=Er;
end
end
end
end
I have 5 images w denotes it,and A1_20(:,:,j1) contains 20 matrices of ,I have multiplied those matrices,with image so for each image i get 20 images and have found error,now i want to display the image with minimum error ,like this i want to do for 5 images
please help

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回答（2 个）

Sean de Wolski
Sean de Wolski 2012-5-10
Use the second output argument from min() and the correct dim input to min() to tell you where the minimum is.
  1 个评论
kash
kash 2012-5-10
Sean i cant understand ,please can you explain it please ,if possible with an example

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Sargondjani
Sargondjani 2012-5-10
i have difficulty understanding your code... but lets say you have: w(:,:,1:5)
you can add another loop (iw=1:5;), store the errors in a vector: Er(iw,1).
Then
[value,index]=min(Er); %if Er is not a vector, then add the dimension (like Sean says)
w(:,:,index) gives you the matrix that minimized the error
something like that
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kash
kash 2012-5-11
Sargondjani i think i did not explain you well,
1.i have 5 images,i am passing it to a loop,one by one
2.ten i am multiplying each image by the matrix A1_20(:,:,j1),where this matrix contains 20 matrix values of zeros and ones,
3.so for 1st image i get 20 matices.(images),in this i want to find the image having minimum error ..
4.finally i want to do for all 5 images
Sargondjani
Sargondjani 2012-5-11
do you understand my method??
i mean, i prefer not to spell out solutions, but to give exampls so you can figure out the details yourself :-)

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