Finding change in direction
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I would like to check all neighbor elements for every element in a 600x400 matrix for a change in direction
for i=1:size(gx,1)
for j=1:size(gx,2)
el_1=matrix(i,j) % Give the value of present element having position i,j
el_2=matrix(i,j-1) % Left element
el_3=matrix(i,j+1) % Right element
el_4=matrix(i-1,j) % for upper element
el_5=matrix(i+1,j)%Upper element
el_6=matrix(i-1,j-1) % West-North Diagonal Element....
if el_1*el_2<0
.....
end
end
I thought of checking each element
Antworten (1)
Bruno Luong
am 22 Apr. 2022
Your code will crash since indexing will be overflowed.
Just an idea you might do the sign comparison of the entire array
[r,c] = find(matrix(:,1:end-1) .* matrix(:,2:end) < 0);
...
The use r, c to do whatever you want to do next.
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