Solve a nonlinear function with one variable

Question

Mohiedin Bagheri 2023-1-16

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1894615-solve-a-nonlinear-function-with-one-variable

评论： Sulaymon Eshkabilov 2023-1-16

Hi,

I need to solve this function using Matlab in single script:

x - x^2 + 2*{sin(x)*(x-1)} = 0

Would you be able to provide a sample code and method to do this in Matlab?

Thank you very much

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

KSSV 2023-1-16

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1894615-solve-a-nonlinear-function-with-one-variable#answer_1149315

在 MATLAB Online 中打开

syms x

eq = x - x^2 + 2*sin(x)*(x-1) == 0

eq =

s = vpasolve(eq)

s =

0

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Mohiedin Bagheri 2023-1-16

编辑：Mohiedin Bagheri 2023-1-16

Thank you @KSSV for your reply.

请先登录，再进行评论。

Answer 2

Sulaymon Eshkabilov 2023-1-16

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1894615-solve-a-nonlinear-function-with-one-variable#answer_1149325

在 MATLAB Online 中打开

It is quite simple to solve this exercise. Just use vpasolve(), e.g.:

syms x
Solution = vpasolve(x-x^2+2*sin(x)*(x-1)==0)
Solution = 0

An alternative way is to try Newton-Raphson method

2 个评论
显示无隐藏无

Mohiedin Bagheri 2023-1-16

编辑：Mohiedin Bagheri 2023-1-16

Thank you @Sulaymon Eshkabilov. Assueming that the solution for f1(x)-f2(x)==0 is 'x_sol' (x=0 in this case). then how would be the rest of the code look like if I want to calculate the f1(x_sol)?

Thank you again

Sulaymon Eshkabilov 2023-1-16

if you are talking about NR method, see this explanation. You'd need to use [for .. end] or [while ... end] loop. See this link where a bunch of matlab codes and discussions of NR method.

请先登录，再进行评论。