Spiral density function implementation

2 次查看（过去 30 天）

显示更早的评论

Orr Streicher 2021-4-27

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/814945-spiral-density-function-implementation

评论： Orr Streicher 2021-5-5

采纳的回答： Paul

Hi,

I need to define a Spiral density function with parameters theat (the angle of the spiral) and r (the radius)

Does anyone know how can i do it ?

Thank

3 个评论
显示 1更早的评论隐藏 1更早的评论

Orr Streicher 2021-4-27

编辑：Orr Streicher 2021-4-27

I dont have the density function formula.. the assignment is to create a Spiral dentity function where thata distrebution is uniform [0, 4pi] and the radius r has normal distrebution where the expectation mu=thata/2 and std=2.5

Star Strider 2021-4-28

Is that in any way related to the problem in Creating a 3d Helix Spiral with Surf command ?

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Paul 2021-4-27

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/814945-spiral-density-function-implementation#answer_686505

I'm going to assume that the question means that the conditional density of r given theta is normal with exepectation mu = theta/2 and sigma = 2.5. Use the defnition of the conditional density function for continuous random variables. You will see that definition contains three terms. You're given two of them, solve for the third.