pre allocating variables in matlab
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i have this block of code but when i access elements, they are not arranged properly
x=zeros(1,10000);
y=zeros(1,10000);
count=1;
for i=1:rows
for j=1:columns
if imgThresh(i,j)==0
y(count)=rows-i+1;
x(count)=j;
count=count+1;
break
end
end
end
nonzeros(x)
nonzeros(y)
2 Comments
James Tursa
on 3 Mar 2021
You need to give us a small example of input and desired output. Please describe specifically what it is about the output of your current code that you don't like. What are you trying to do?
Answers (1)
Walter Roberson
on 4 Mar 2021
That's not what I get.
imgThresh = im2bw(imread('image.png'));
rows = size(imgThresh,1);
columns = size(imgThresh,2);
x=zeros(1,10000);
y=zeros(1,10000);
count=1;
for i=1:rows
for j=1:columns
if imgThresh(i,j)==0
y(count)=rows-i+1;
x(count)=j;
count=count+1;
break
end
end
end
plot(x,y)
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