what is the difference between sym2poly and coeffs?
9 ビュー (過去 30 日間)
古いコメントを表示
It seems them get a different vector elements order.... Anyone tell me the concrete distinction? thks!
0 件のコメント
回答 (2 件)
David Sanchez
2013 年 5 月 30 日
sym2poly is used when symbolic notation is used. Both return the coefficients of a polynomial.
You can read the help of each one to see the slight difference between them through the examples therein provided.
help sym2poly
help coeffs
Azzi Abdelmalek
2013 年 5 月 30 日
編集済み: Azzi Abdelmalek
2013 年 5 月 30 日
syms x u
%first example
y=x^3 - 2*x - 5
sym2poly(y) % considere y as a polynome
ans =
1 0 -2 -5
coeffs(y) % considere y as any expression
ans =
[ -5, -2, 1] % the coefficient 0 is omitted
% second example
y=x^2+3*u^3+25
coeffs(y)
ans =
[ 25, 1, 3]
sym2poly(y)
Error using sym/sym2poly (line 21)
Input has more than one symbolic variable.
0 件のコメント
参考
カテゴリ
Help Center および File Exchange で Symbolic Math Toolbox についてさらに検索
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!