MATLAB Function Reference

sign

Signum function

Syntax

• Y = sign(X)
  

Description

Y = sign(X) returns an array Y the same size as X, where each element of Y is:

• 1 if the corresponding element of X is greater than zero
• 0 if the corresponding element of X equals zero
• -1 if the corresponding element of X is less than zero

For nonzero complex X, sign(X) = X./abs(X).

See Also

abs, conj, imag, real

shrinkfaces

sin

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