Collect only non-zero elements of a 3x3xN matrix
조회 수: 2 (최근 30일)
이전 댓글 표시
Hi,
I've a symbolic 3x3xN (with N variable) matrix I with some non-zero elements, like:
I(:,:,1) =
[ 0, 0, 0]
[ 0, 0, 0]
[ 0, 0, Il1]
I(:,:,2) =
[ 0, 0, 0]
[ 0, 0, 0]
[ 0, 0, Il2]
and I want to collect them into an array, but when I try:
[m,v]=find(I~=0)
it returns indices like m=3 v=9. How can I find them from the 3-D matrix and collect them into an array ?
댓글 수: 0
채택된 답변
Image Analyst
2013년 1월 18일
편집: Image Analyst
2013년 1월 18일
You simply extract them, like this:
nonZeroElements = I(I~=0);
That gives you a big long vector of all the array values that are not zero, in row major order.
추가 답변 (1개)
Matt J
2013년 1월 18일
I don't have the Symbolic Math Toolbox, but you could try the NONZEROS command. Don't know if it's overloaded for type sym.
참고 항목
제품
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!