'subs' not working as i want
조회 수: 1 (최근 30일)
이전 댓글 표시
Hello guys,
I have this equation -x^2/2 + 2*x - (5*I)/2 and I'm trying to replace the letter x with a the matrix A and the letter I with the matrix B.
A = 0 1 0
0 0 1
2 -5 4
B = eye(3)
The problem is that when I write subs(eq, x, A) and subs(eq, I, eye(3)) I get a very big matrix, and this is not the answer.
댓글 수: 2
YT
2018년 12월 8일
편집: YT
2018년 12월 8일
It makes sense that your result will be "a very big matrix". subs(eq, x, A) will give you a 3x3 matrix because you substitute x for a 3x3 matrix. With subs(eq, I, eye(3)) you are trying to substiute an identity matrix in your previous subsituted matrix. So what do you expect the result to be then?
채택된 답변
추가 답변 (0개)
참고 항목
카테고리
Help Center 및 File Exchange에서 Function Creation에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!