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MATLAB Function Reference    
sign

判斷正負號

Syntax

Description

Y = sign(X) 回傳一個跟陣列 X 同樣大小的陣列 Y,其陣列裡元素的值為:

對於非 0 的複數 X,則 sign(X) = X./abs(X)

See Also
abs         絕對值與複數值(Complex magnitude)

conj        共軛複數(Complex conjugate)

imag        複數(complex)的虛部(Imaginary part)

real        複數(complex)的實部(Real part)


 shrinkfaces sin, sinh