ABS Absolute Value Function

Section: Elementary Functions

Usage

Returns the absolute value of the input array for all elements. The general syntax for its use is 
   y = abs(x)

where x is an n-dimensional array of numerical type. The output is the same numerical type as the input, unless the input is complex or dcomplex. For complex inputs, the absolute value is a floating point array, so that the return type is float. For dcomplex inputs, the absolute value is a double precision floating point array, so that the return type is double.

Example

The following demonstrates the abs applied to a complex scalar. 
--> abs(3+4*i)

ans = 
 5

The abs function applied to integer and real values: 

--> abs([-2,3,-4,5])

ans = 
 2 3 4 5

For a double-precision complex array, 

--> abs([2.0+3.0*i,i])

ans = 
    3.6056    1.0000