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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<TITLE>REAL Real Function
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<H2>REAL Real Function
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<P>
Section: <A HREF=sec_elementary.html> Elementary Functions </A>
<H3>Usage</H3>
Returns the real part of the input array for all elements. The
general syntax for its use is
<PRE>
y = real(x)
</PRE>
<P>
where <code>x</code> is an <code>n</code>-dimensional array of numerical type. The output
is the same numerical type as the input, unless the input is <code>complex</code>
or <code>dcomplex</code>. For <code>complex</code> inputs, the real part is a floating
point array, so that the return type is <code>float</code>. For <code>dcomplex</code>
inputs, the real part is a double precision floating point array, so that
the return type is <code>double</code>. The <code>real</code> function does
nothing to real and integer types.
<H3>Example</H3>
The following demonstrates the <code>real</code> applied to a complex scalar.
<PRE>
--> real(3+4*i)
ans =
3
</PRE>
<P>
The <code>real</code> function has no effect on real arguments:
<PRE>
--> real([2,3,4])
ans =
2 3 4
</PRE>
<P>
For a double-precision complex array,
<PRE>
--> real([2.0+3.0*i,i])
ans =
2 0
</PRE>
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