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 = 

 3

The real function has no effect on real arguments:

--> real([2,3,4])

ans = 

 2 3 4

For a double-precision complex array,

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

ans = 

 2 0