清空筛选条件
清空筛选条件

partfrac() function returning same expression

2 次查看（过去 30 天）
Esteban
Esteban 2024-1-31
评论： Dyuman Joshi 2024-2-19
Ran in:
syms s
% Given expression
F = partfrac((s^2+2*s+1)/(s^3-5*s+3),s)
F = 
The output is as follows.
F =
(s^2 + 2*s + 1)/(s^3 - 5*s + 3)
I know syms has a big part to do with it but im not sure exactly what.

请先登录，再回答此问题。

回答（1 个）

Dyuman Joshi
Dyuman Joshi 2024-1-31
移动：Steven Lord 2024-1-31
Ran in:
It gives the same expression as the output because the denominator can not be decomposed with the default factor format i.e. 'rational'.
You can specify a 'full' or 'real' factor mode but the output might not be easy to look at -
syms s
F1 = partfrac((s^2+2*s+1)/(s^3-5*s+3),s,'FactorMode','real')
F1 = 
F2 = partfrac((s^2+2*s+1)/(s^3-5*s+3),s,'FactorMode','full')
F2 = 
vpa(F2)
ans = 
  3 个评论
显示 1更早的评论
Dyuman Joshi
Dyuman Joshi 2024-1-31
Ran in:
I assume you mean to show the output with 4 significant digits -
syms s
F = partfrac((s^2+2*s+1)/(s^3-5*s+3),s,'FactorMode','full')
F = 
vpa(F, 4)
ans = 

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Symbolic Math Toolbox 的更多信息

标签

产品


版本

R2023b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by