- You have one NxN matrix A
- And a second 1xN vector B
- When an element of B is zero, you delete rows and columns from A with the same index
Delete and merge rows and columns based on values of other matrix
1 view (last 30 days)
Show older comments
suppose consider a matrix of A = [1 2 3 4 ; 5 6 7 8 ; 9 1 2 3 ; 1 2 3 4] consider matrix B = [ 1 0 2 4 ]
so in matrix B value of 2 unit is 0 so i need to delete second row and second column in matrix A
final A1 matrix = [1 3 4 ; 9 2 3 ; 1 3 4]
0 Comments
Accepted Answer
Sindar
on 21 Feb 2020
If I understand correctly:
A = [1 2 3 4 ; 5 6 7 8 ; 9 1 2 3 ; 1 2 3 4];
B = [ 1 0 2 4 ];
% find where B is nonzero
idx = find(B~=0);
% copy corresponding rows and columns of A to A1
A1=A(idx,idx);
7 Comments
Guillaume
on 24 Feb 2020
I'm not sure which of your 3 questions the above refers to. You would be better off starting a new question for each topic.
More Answers (0)
See Also
Categories
Find more on Number Theory in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!