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FreeMat
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Section: Elementary Functions
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.
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