COMEDI_FROM_PHYSICAL(3) 					 Comedi reference					   COMEDI_FROM_PHYSICAL(3)

NAME

       comedi_from_physical - convert physical units to sample using calibration data

SYNOPSIS

       #include <comedilib.h>

       lsampl_t comedi_from_physical(double data, const comedi_polynomial_t * conversion_polynomial);

DESCRIPTION

       Converts data given in physical units into Comedi's integer sample values (lsampl_t, between 0 and maxdata -- see comedi_get_maxdata). The
       conversion_polynomial parameter is obtained from either comedi_get_hardcal_converter or comedi_get_softcal_converter. The allows non linear
       and board specific correction. The result will be rounded using the C library's current rounding direction. No range checking of the input
       data is performed. It is up to you to ensure your data is within the limits of the output range you are using.

RETURN VALUE

       Comedi sample value corresponding to input physical value.

AUTHORS

       David Schleef <ds@schleef.org>
	   Author.

       Frank Mori Hess <fmhess@users.sourceforge.net>
	   Author.

       Herman Bruyninckx <Herman.Bruyninckx@mech.kuleuven.ac.be>
	   Author.

       Bernd Porr <tech@linux-usb-daq.co.uk>
	   Author.

       Ian Abbott <abbotti@mev.co.uk>
	   Author.

COPYRIGHT

       Copyright (C) 1998-2003 David Schleef
       Copyright (C) 2001-2003, 2005, 2008 Frank Mori Hess
       Copyright (C) 2002-2003 Herman Bruyninckx
       Copyright (C) 2012 Bernd Porr
       Copyright (C) 2012 Ian Abbott

       This document is part of Comedilib. In the context of this document, the term "source code" as defined by the license is interpreted as the
       XML source.

       This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as
       published by the Free Software Foundation, version 2.1 of the License.

       This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

       You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software
       Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

Comedi								    07/06/2012						   COMEDI_FROM_PHYSICAL(3)