MATLAB Function Reference

abs

Absolute value and complex magnitude

Syntax

• Y = 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
  

See Also

angle, sign, unwrap

zip

acos