What is the problem with the heaviside function?

20 次查看（过去 30 天）
Mr M.
Mr M. 2015-9-10
评论： Dief Gerard 2022-2-10
fun =
@(p,x)p(1)*heaviside(x-p(2))
Undefined function 'heaviside' for input arguments of type 'double'.

请先登录，再回答此问题。

采纳的回答

Star Strider
Star Strider 2015-9-10
Your function works for me. Do you have the Symbolic Math Toolbox?
If you don’t substitute a call to this one for the heaviside call:
hvsd = @(x) [0.5*(x == 0) + (x > 0)];
I tested both, they give equivalent results.
  2 个评论
Mr M.
Mr M. 2015-9-10
Symbolic Math Toolbox for what? for the heaviside function??
Star Strider
Star Strider 2015-9-10
编辑：Star Strider 2015-9-10
Yes. The heaviside function is only in the Symbolic Math Toolbox. My function provides the same results, so you can use it instead. I abbreviated its name to ‘hvsd’ be sure it didn’t overshadow heaviside on my computer so I could test both of them. You can obviously name it whatever you want.

请先登录，再进行评论。

更多回答（1 个）

Thorsten
Thorsten 2015-9-10
编辑：Thorsten 2015-9-10
The error means that Matlab cannot find the heaviside function. Try
which heaviside
to locate the function. The heaviside function is part of the Symbolic Math Toolbox. If you do not have this TB, you can write your own heaviside function
function y = heaviside(x)
y = (x > 0) + 0.5*(x == 0);

类别

在 Help Center 和 File Exchange 中查找有关 Startup and Shutdown 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