MATLAB Function Reference

abs

Absolute value and complex magnitude

Syntax

Y = abs(X)

Description

abs(X) returns the absolute value, , for each element of X.

If X is complex, abs(X) returns the complex modulus (magnitude):

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

Examples

abs(-5) = 5
abs(3+4i) = 5

See Also

angle, sign, unwrap

Colon :

acos, acosh