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# ppc_cmplx_mult

## PURPOSE

function z = ppc_cmplx_mult(x,y)

## SYNOPSIS

function z = ppc_cmplx_mult(x,y)

## DESCRIPTION

``` function z = ppc_cmplx_mult(x,y)

multiplies two complex valued vectors by breaking up
the multiplication into multiple steps to avoid rounding
errors that will return erroneous results if a number is multiplied
by its complex conjugate on the PowerMac

Use this function if you want a complex vector multiplied by its conjugate
to return a real-valued vector.

Tech-support at Mathworks suggested this fix.```

## CROSS-REFERENCE INFORMATION

This function calls:
This function is called by:

## SOURCE CODE

```0001 function z = ppc_cmplx_mult(x,y)
0002 % function z = ppc_cmplx_mult(x,y)
0003 %
0004 % multiplies two complex valued vectors by breaking up
0005 % the multiplication into multiple steps to avoid rounding
0006 % errors that will return erroneous results if a number is multiplied
0007 % by its complex conjugate on the PowerMac
0008 %
0009 % Use this function if you want a complex vector multiplied by its conjugate
0010 % to return a real-valued vector.
0011 %
0012 % Tech-support at Mathworks suggested this fix.
0013
0014 % Written by Petr Janata, Jan. 17, 1996.
0015
0016 z = real(x).*real(y) + real(x).*imag(y) + real(y).*imag(x) - imag(x).*imag(y);
0017
0018 return```

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