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Subsections

REAL Real Function

Usage

Returns the real part of the input array for all elements. The general syntax for its use is

   y = real(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 real part is a floating point array, so that the return type is float. For dcomplex inputs, the real part is a double precision floating point array, so that the return type is double. The real function does nothing to real and integer types.

Example

The following demonstrates the real applied to a complex scalar.

--> real(3+4*i)
ans = 
  <float>  - size: [1 1]
    3.0000000

The real function has no effect on real arguments:

--> real([2,3,4])
ans = 
  <int32>  - size: [1 3]
 
Columns 1 to 3
             2              3              4

For a double-precision complex array,

--> real([2.0+3.0*i,i])
ans = 
  <double>  - size: [1 2]
 
Columns 1 to 2
    2.000000000000000         0.000000000000000



Samit K. Basu 2005-03-16