Plotting a function containing a single integral with two variables

2 次查看（过去 30 天）
Abdallah Qaswal
Abdallah Qaswal 2022-4-17
编辑： Torsten 2022-4-17
URGENT HELP, PLEASE! Could you please help me to plot the function in the figure attached ? It contains two variables in the integral but one of them (y) is held constant but still I want to plot the final function f(a,y) with respect to a (the upper limit of the integral) and y!

请先登录，再回答此问题。

回答（2 个）

Torsten
Torsten 2022-4-17
Use the integral expression obtained here
https://www.wolframalpha.com/input?i=Exp%5B-a*x%2Bb*Sqrt%5Bc-x%5D%5D
for the x-integral, insert the limits and solve the resulting equation in y using "fzero" or "fsolve".
Abdallah Qaswal
Abdallah Qaswal 2022-4-17
Hi, Thank you for response! Please, see my code and guess where is the problem!
  3 个评论
显示 1更早的评论
Abdallah Qaswal
Abdallah Qaswal 2022-4-17
Actually, I have solved the problem with this exponent but the case was that y is defined by certain value e.g.: 0.07. However, in this case it is variable! My problem is within the integral itself since there are two variables!
Torsten
Torsten 2022-4-17
编辑：Torsten 2022-4-17
I gave you the antiderivative of f with respect to x in the link. You only have to give the appropriate values to a, b and c.
But with this exponent, you won't have a chance to reasonably evaluate fun1 although you will be able to write down q as a function of a and y explicitly .

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