differentiation in matlab of two functions

3 次查看（过去 30 天）
Murali Krishna AG
Murali Krishna AG 2020-12-3
评论： Stephan 2020-12-4
Let
theta=atan(p/q)+pi
a(theta)=exp(2*pi*j*A*[cos(theta);sin(theta)]) where A ,is row vector and p,q,A are known
I need to find the in matlab.Please help me on this

请先登录，再回答此问题。

回答（2 个）

Alan Stevens
Alan Stevens 2020-12-3
a = @(theta) exp(2j*pi*A*[cos(theta);sin(theta)]);
dadtheta = @(theta) 2j*pi*A*[-sin(theta);cos(theta)]*a(theta);
Stephan
Stephan 2020-12-3
syms a(theta) p q A
eq1 = a(theta)==exp(2*pi*1i*A*[cos(theta);sin(theta)])
eq2 = theta==atan(p/q)+pi
Deq1 = diff(eq1,theta)
sol = subs(rhs(Deq1),theta,rhs(eq2))
pretty(sol)
  6 个评论
显示 4更早的评论
Stephan
Stephan 2020-12-4
Did you notice that you can accept and/or vote for useful answers?

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Numerical Integration and Differential Equations 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