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单词 Signum function
释义

Signum function

中文百科

符号函数 Sign function

(重定向自Signum function)
Signum function y = sgn(x)
The sign function is not continuous at x = 0.

符号函数Sign function,简称sgn)是一个逻辑函数,用以判断实数的正负号。为避免和英文读音相似的正弦函数(sine)混淆,它亦称为Signum function。其定义为:

英语百科

Sign function 符号函数

(重定向自Signum function)
Signum function y = sgn(x)
The sign function is not continuous at x = 0.

In mathematics, the sign function or signum function (from signum, Latin for "sign") is an odd mathematical function that extracts the sign of a real number. In mathematical expressions the sign function is often represented as sgn.

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