circshift() one number ,in each iteration?

2013 10 6
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更新时间：2013 10 6
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can I am do shifting the number A(2,1) of matrix (A) ,one times in each iteration,('iter=0' ,iter=iter+1)? how can do that?
A=[1 2 3;4 5 6;7 8 9]
% Shift A(2,1)
for k=1:size(A,2)-1
A(2,:)=circshift(A(2,:),[0 1])
end

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Azzi Abdelmalek
Azzi Abdelmalek 2013-10-6
That's what the code is doing
Image Analyst
Image Analyst 2013-10-6
It shifts the entire second row one element at each iteration of the loop. Is that not what you wanted? Did you want to shift only the (2,1) element and not all of the elements in the second row? Either way, why? Seems like a funny thing to do unless it's homework or something. But it can't be homework because you would have tagged it as homework, so why do you want to do this?

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Azzi Abdelmalek
Azzi Abdelmalek 2013-10-6

0 个投票

Maybe you want to save all the results
clear
A=[1 2 3;4 5 6;7 8 9]
% Shift A(2,1)
for k=1:size(A,2)-1
A(2,:)=circshift(A(2,:),[0 1])
out{k}=A
end
celldisp(out)

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Mary Jon
Mary Jon 2013-10-6
编辑：Mary Jon 2013-10-6
I am have this error!!!
Undefined function or variable "out".
Error in ==> sumaei at 26 celldisp(out)
(by using matlab R14)
Azzi Abdelmalek
Azzi Abdelmalek 2013-10-6
copy and paste the code, there is no error
Mary Jon
Mary Jon 2013-10-6
编辑：Azzi Abdelmalek 2013-10-6
yes, there is no error, but when I am applied on my code Iam have error!!!
my code is
d=2:1:33;
E_0=(1/(36*pi))*1e-9;
E_r=1;
E=E_0*E_r*ones(111,34);
E(2:5,d)=10;
E(7:17,2:33)=4;
E(20,1)=100; % Shift E(20,1)=100
for k=1:size(E,20)-1
E(20,:)=circshift(E(20,:),[0 1])
out{k}=E
end
celldisp(out)
Image Analyst
Image Analyst 2013-10-6
E doesn't have a 20th dimension so size(E,20)-1 = 0-1 = -1 which means your loop never gets entered. So when it comes time to do celldisp(), there is no out at all to display.
Mary Jon
Mary Jon 2013-10-6
isnt it? that mean E(20,1) at row number 20,column number 1,
I am want shifting it (2:33),with save all the result not last result only
Image Analyst
Image Analyst 2013-10-6
编辑：Image Analyst 2013-10-6
size(array, n) means the length of array in the nth dimension. It DOES NOT mean array(n) which is the value of the array at index n. They're totally different things. By the way, you never answered my question in the comment at the very top.

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