Related to comparing two vectors
4 views (last 30 days)
Show older comments
chaaru datta
on 23 Oct 2023
Answered: Fabio Freschi
on 23 Oct 2023
Hello all, In my work I came across a situation where I have two vectors of dimension 8 X 1 each.
These vectors have all zero values except at any two rows.
My query is how to compare the non-zero positions of these two matrices in MATLAB.
Any help in this regard will be highly appreciated.
2 Comments
NAVNEET NAYAN
on 23 Oct 2023
From your query, it appears that you want to find the location of non-zero values from both vectors and then compare it (correct me if I am wrong). Can you please explain what kind of comparison do you want?
Dyuman Joshi
on 23 Oct 2023
@chaaru datta, Is this question the same as - https://in.mathworks.com/matlabcentral/answers/2037316-extract-indices-of-vector?s_tid=srchtitle ?
Accepted Answer
Fabio Freschi
on 23 Oct 2023
You can compare the two complete vectors (you also compare zeros, but who cares?)
% data
v1 = [0 0 0 4 5 0 0 0].';
v2 = [0 0 0 4 6 0 0 0].';
v3 = [0 0 0 4 5 0 0 0].';
% engine
v1eqv2 = isequal(v1,v2)
v1eqv3 = isequal(v1,v3)
or you can compare nonzero indices and values
% data
v1 = [0 0 0 4 5 0 0 0].';
v2 = [0 0 0 4 6 0 0 0].';
v3 = [0 0 0 4 5 0 0 0].';
% find nonzeros
[idx1,val1] = find(v1);
[idx2,val2] = find(v2);
[idx3,val3] = find(v2);
% engine
v1eqv2 = isequal(idx1,idx2) && isequal(val1,val2)
v1eqv3 = isequal(idx1,idx3) && isequal(val1,val3)
If you only want to check if the nonzero positions are the same
% data
v1 = [0 0 0 4 5 0 0 0].';
v2 = [0 0 0 4 6 0 0 0].';
% find nonzeros
idx1 = find(v1);
idx2 = find(v2);
% engine
v1eqv2pos = isequal(idx1,idx2)
0 Comments
More Answers (0)
See Also
Categories
Find more on Elementary Polygons in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!