abs

Absolute value and complex magnitude
Syntax

abs(X)

Description

abs(X) returns an array Y such that each element of Y is the absolute value of the corresponding element of X.

If X is complex, abs(X) returns the complex modulus (magnitude), which is the same as

sqrt(real(X).^2 + imag(X).^2)

Examples

abs(-5)
ans =
     5

abs(3+4i)
ans =
     5