Symbolic toolbox help using solve command

4 次查看（过去 30 天）
kyle lyth
kyle lyth 2012-3-12
I have the following simple code and Im not sure how else to solve it for more than one equation, the variable hl and hr can change at any time so I want matlab to automatically solve for the different equation im assuming its something simple that i have missed, thanks in advance kyle
hl = 1;
hr = 0.1;
g=9.81;
syms s
geneqn = s*((s - ((g*hr)/(4*s))*(1+(sqrt(1+((8*s^2)/(g*hr)))))) + 2*(sqrt(((g*hr)/2)*(sqrt(1+((8*s^2)/(g*hr)))-1))) - 2*sqrt(g*hl));
S = solve('geneqn=0')
s=0 << %I know that this is not correct

请先登录，再回答此问题。

采纳的回答

Andrei Bobrov
Andrei Bobrov 2012-3-12
hl = 1; hr = 0.1; g=9.81;
syms s
geneqn = s*((s - ((g*hr)/(4*s))*(1+(sqrt(1+((8*s^2)/(g*hr))))))...
+ 2*(sqrt(((g*hr)/2)*(sqrt(1+((8*s^2)/(g*hr)))-1))) - 2*sqrt(g*hl));
out = solve(geneqn,s)
on my PC:
  1 个评论
kyle lyth
kyle lyth 2012-3-12
thank you for the quick response, i didn't realise it would solve for zero automatically :) thanks again kyle

请先登录，再进行评论。

更多回答（0 个）

类别

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

标签

Community Treasure Hunt

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

Start Hunting!

Translated by