why i receive Nan for integral -inf to -inf ?

1 次查看（过去 30 天）
xosro
xosro 2017-7-21
回答： Steven Lord 2017-7-21
for example:
if true
integral(@(x)exp(-(x.^2)/2),-inf,-inf)
end

请先登录，再回答此问题。

采纳的回答

Richard Marveldoss
Richard Marveldoss 2017-7-21
The integral from -inf to -inf over exp(-(x.^2)/2) is the same as calculating the area of the rectangle bounded by -inf and -inf with a height e(-(x.^2)/2) evaluated at -inf(which is 0).The difference between -infs will return an NaN in MATLAB . The NaN times the height(0) results in NaN as well. The documentation link for properties of NaN : https://www.mathworks.com/help/matlab/ref/nan.html

更多回答（1 个）

Steven Lord
Steven Lord 2017-7-21
For computing that integral, you probably want to use the erf and/or erfc functions.

类别

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

标签

尚未输入任何标签。

Community Treasure Hunt

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

Start Hunting!

Translated by