problem in writing a function

Question

Bijoy 2013-6-16

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/79206-problem-in-writing-a-function

What is the problem with this code?

 function Y = BWMfn(B)
[m,n]=size(B);
Y=zeros(2*m,2*n);
for i=1:m;
 for   j=1:n;
    if B(i,j)<128
        Y(2*i-1,2*j-1)=0;
    else
        Y(2*i-1,2*j-1)=1;
    end
 end
end

BWM is a matrix. Please reply asap

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Bijoy 2013-6-16

I am getting this error:

Error using BWMfn (line 3)

Not enough input arguments.

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Answer 1

Image Analyst 2013-6-16

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/79206-problem-in-writing-a-function#answer_88938

在 MATLAB Online 中打开

Why do you even want this anyway? It's kind of like simple thresholding

Y = B >= 128;

except that it has rows and columns of zeros interleaved. Why would you want that? By the way, you could vectorize it by doing:

Y = zeros(2*size(B));
Y(1:2:end, 1:2:end) = B >= 128;

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Bijoy 2013-6-16

I want the function in some other code for the purpose of data embeding. The function should do thresholding and give elements of the vector as Its output one by one. But the problem is I have to use the function within Some other loop.

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