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sign

Returns the sign of the value passed in.

Syntax

R = sign(x)

Inputs

x
Any valid scalar | vector | matrix.
Type: double | integer | logical | struct | cell
Dimension: scalar | vector | matrix

Outputs

R
Resulting scalar | vector | matrix.

Examples

Simple scalar input:
R = sign(4)
R = 1
Complex input:
R = sign(1-2i)
R = 0.447214-0.894427i
Matrix input:
R = sign([1,-2;0,1])
R = [ 1 -1 ; 0 1 ]
Complex matrix input:
R = sign([1,-2;1+2i,-3i+1])
R = [ 1, -1; 0.447214 + 0.894427i, 0.316228-0.948683i]

Comments

The sign of a complex number is computed as z ./ abs(z)