anonymous, piecewise-defined function that has NaN as response for a certain subdomain

9 次查看（过去 30 天）
Thomas Schäfer
Thomas Schäfer 2022-8-31
评论： Thomas Schäfer 2022-9-1
I want to make an Matlab anonymous, piecewise-defined function that has NaN as response for a certain subdomain, but I am uncertain how to do this.
For an anonymous, piecewise-defined function without NaN response like this:
I would use a script like this:
g=@(x) (x) .* (x<=-1)+...
(x+1) .* (x>-1 & x<1)+...
(-x+4) .* (x>=1);
I would apriciate if someone would give me a tip how to include a subdomain that has NaN as response in my anonymous function, let say g(x)=NaN for 2<x<=4. I do not have access to any relevant toolboxes.

请先登录，再回答此问题。

采纳的回答

Walter Roberson
Walter Roberson 2022-8-31
... + 0./~(2<x & x<=4)
If the value is not in the range then the basic logic test returns false and ~ that is true which is 1 and 0./1 is 0 so 0 would be added which would have no effect.
If the value is in the range then the basic logic test returns true and ~ returns false which is 0 and 0./0 is nan.

更多回答（1 个）

Torsten
Torsten 2022-8-31
Ran in:
g=@(x) (x) .* (x<=-1)+...
(x+1) .* (x>-1 & x<1)+...
(-x+4) .* (x>=1);
x = [-2,0,1.5,2.5,5];
gx = g(x);
gx(x>2 & x<=4)=NaN
gx = 1×5
-2.0000 1.0000 2.5000 NaN -1.0000

类别

在 Help Center 和 File Exchange 中查找有关 Monte Carlo Analysis 的更多信息

标签

产品


版本

R2019a

Community Treasure Hunt

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

Start Hunting!

Translated by