how can I stop this error?

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Mary Jon 2013-10-1

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/88854-how-can-i-stop-this-error

评论： Walter Roberson 2013-10-2

this is code of my equation getting from you.

Z = zeros(size(W1)); kernel = [Z, W1, Z; W3, Z, W4; Z, W2, Z]; filtered = conv2(vk, kernel, 'same'); vk = (1-w)*vk + filtered./W(i,j);

my equation

v(i,j))^(k+1)=  (1-ω)(v(i,j))^(k)-ω[(W1(i,j)(v(i+1,j))^(k)+  W2(i,j)(v(i-1,j))^(k+1)+ W3(i,j)(v(i,j+1)^(k)+ W4(i,j)(v(i,j-1))^(k+1)(/(W i,j)]
v matrix
k iteration
W  matrix 
w constant

the error I have is!.

Undefined function or variable "vk".
Error in ==> SOR at 69 filtered = conv2(vk, kernel, 'same');

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Mary Jon 2013-10-1

Sorry ,but what I do to 'vk'? how make it defined ?

Image Analyst 2013-10-1

vk is presumably your original signal. If you don't know what it is, then what do you think you're filtering? Why are you attempting to filter something but don't know what it is? If you're running a filter, you must have some idea of what you want to filter, otherwise, why bother?

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