How to get norm (magnitude) of a vector the simple way?
조회 수: 1 (최근 30일)
이전 댓글 표시
I just want to get the norm of
syms phi the;
c = [-cos(phi)*sin(the)^2;-sin(phi)*sin(the)^2; - cos(the)*sin(the)*cos(phi)^2 - cos(the)*sin(the)*sin(phi)^2]
norm(c,2)
isn't really simplifying anything
If I type it manually:
simplify(sqrt(cos(phi)^2*sin(the)^4+sin(phi)^2*sin(the)^4+sin(the)^2*cos(the)^2))
I get a simple answere:
(sin(the)^2)^(1/2)
댓글 수: 5
David Goodmanson
2021년 5월 6일
Hi Niklas,
If your last two vector elements were
- cos(the)*sin(the)*cos(phi) - cos(the)*sin(the)*sin(phi)
i.e. cos(phi) and sin(phi) not squared, then you would get what you say. But since cos(phi) and sin(phi) are squared, you don't.
채택된 답변
추가 답변 (0개)
참고 항목
카테고리
Help Center 및 File Exchange에서 Creating and Concatenating Matrices에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!