What's the point of 'isinf' function ?

4 次查看（过去 30 天）
Infinite_king
Infinite_king 2024-1-5
回答： Infinite_king 2024-1-8
In MATLAB we can use '==' operator to check whether the given variable is a finite or infinite. I'm wondering is there any advantages of using 'isinf' function ? like improvement in execution time or handling of some execptions. Any information is helpful. Thank you.

请先登录，再回答此问题。

采纳的回答

Infinite_king
Infinite_king 2024-1-8
Reason 1:-
As @Paul and @Walter Roberson pointed out, 'isinf' will make it easier to check for inf values when complex numbers are involved.
Note :- I will add more reasons if I come across any in the future.

更多回答（1 个）

Matt J
Matt J 2024-1-5
编辑：Matt J 2024-1-5
Ran in:
For one thing, it covers cases were the inf elements have mixed signs, thus avoiding the overhead of additional operations like abs().
isinf([-inf, 2, inf, 5])
ans = 1×4 logical array
1 0 1 0
  5 个评论
显示 3更早的评论
Paul
Paul 2024-1-5
As documented: isinf
"If A contains complex numbers, isinf(A) contains 1 for elements with infinite real or imaginary part, and 0 for elements where both real and imaginary parts are finite or NaN."
Infinite_king
Infinite_king 2024-1-8
Thanks for the comments @Paul and @Walter Roberson. I guess that is a good enough reason to use 'isinf' instead of '==' operator.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Assumptions 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by