problem in writing a function

2013 6 16
2 个回答
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0 个投票

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
Bijoy 2013-6-16
I am getting this error:
Error using BWMfn (line 3)
Not enough input arguments.

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Image Analyst
Image Analyst 2013-6-16

0 个投票

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
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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Walter Roberson
Walter Roberson 2013-6-16

0 个投票

You need to start the function from the command line, not by clicking on "Run" or pressing F5. For example at the command line command
BWMfn(rand(3,4))

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