清空筛选条件
清空筛选条件

Defining Dirac Function matlab

5 次查看（过去 30 天）
Jente Marien
Jente Marien 2017-3-2
回答： Walter Roberson 2017-3-2
x(t) = t(u(t + 2) − 3 u(t − 3) + 2 u(t − 5))
How can I plot this function, with u as the diriac and t as a variable?
  2 个评论
Walter Roberson
Walter Roberson 2017-3-2
It seems much more likely to me that you want Heaviside rather dirac.
Rik
Rik 2017-3-2
I agree with Walter. If so, you could implement the Heaviside function (if there is not already an implementation built in) with something like (x+abs(x))/2

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Walter Roberson
Walter Roberson 2017-3-2
heaviside exists in the Symbolic Math toolbox. Please be careful about the value of heavside(0); since R2015a you have been able to configure that value using sympref()
dirac exists in the Symbolic Math toolbox as well. Please remember that dirac() is technically a distribution, and that dirac(x) is 0 for all non-0 x and is infinite for x == 0, so multiplying dirac(x) by a constant only makes sense if you are integrating a function that contains dirac() (in which case you get the heaviside step function.)

类别

在 Help Center 和 File Exchange 中查找有关 Assumptions 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