| MATLAB Functions | Help Desk |
abs
Absolute value and complex magnitude
Y = abs(X)
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)
abs(-5) = 5 abs(3+4i) = 5
angle Phase angle
sign Signum function
unwrap Correct phase angles