solve non-linear equation

5 次查看（过去 30 天）
Fernando Robert Ferrel Ballestas
编辑： Matt J 2023-3-20
Hello everybody,
I have an equation having the following form:
G = e^(-z)+ pho*e^(L-2z); with pho, G and L constant. I would like to find the z value. Could you suggest me a function to implement a code for solving my equation?
Thank you in advance
Fernando.

请先登录，再回答此问题。

采纳的回答

David Hill
David Hill 2023-3-20
Use fzero
eqn=@(z)exp(-z)+pho*exp(L-2*z)-G;%you could plot the function to find the approximate location of the root
z=fzero(eqn,0)

更多回答（1 个）

Matt J
Matt J 2023-3-20
编辑：Matt J 2023-3-20
Ran in:
You can solve for x=e^(-z) using roots. Then use z=-log(x).
Example:
z=2.4;
pho=2;
L=2;
G = exp(-z) + pho*exp(L-2*z);
x=roots([pho*exp(L),1,-G]);
z=-log(x(x>0))
z = 2.4000

类别

在 Help Center 和 File Exchange 中查找有关 Mathematics 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