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/* *
* This file is part of the ESO UVES Pipeline *
* Copyright (C) 2004,2005 European Southern Observatory *
* *
* This library is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program 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 General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the Free Software *
* Foundation, 51 Franklin St, Fifth Floor, Boston, MA 02111-1307 USA *
* */
/*
* $Author: amodigli $
* $Date: 2010-09-24 09:32:07 $
* $Revision: 1.7 $
* $Name: not supported by cvs2svn $
*
*/
/*----------------------------------------------------------------------------*/
/**
* @addtogroup uves_physmod
*/
/*----------------------------------------------------------------------------*/
/**@{*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
/*-----------------------------------------------------------------------------
Includes
-----------------------------------------------------------------------------*/
#include <uves_physmod_necregr.h>
#include <uves_error.h>
#include <uves_msg.h>
/*-----------------------------------------------------------------------------
Defines
-----------------------------------------------------------------------------*/
/*-----------------------------------------------------------------------------
Functions prototypes
----------------------------------------------------------------------------*/
/*-----------------------------------------------------------------------------
Static variables
-----------------------------------------------------------------------------*/
/*-----------------------------------------------------------------------------
Functions code
-----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
/**
@brief This procedure does a linear fit of independent orders
@param ord_tbl The input order table
@param reg_tbl The output regression table.
@return 0 if everything is ok, -1 otherwise
This procedure does a linear fit of independent orders and writes the rms in a table
*/
/*----------------------------------------------------------------------------*/
int
uves_physmod_necregr(cpl_table** ord_tbl, cpl_table** reg_tbl)
{
int order=0;
int nb_order=0;
int order_nb=0;
int row=0;
int ncol=0;
int nrow=0;
int selected=0;
int null=0;
int ord_min=0;
int ord_max=0;
double x=0., y=0.;
double det=0., a=0., b=0., rms=0.;
uves_msg_debug("start %s",__func__);
nrow=cpl_table_get_nrow(*ord_tbl);
ncol=cpl_table_get_ncol(*ord_tbl);
uves_msg_debug("nrow=%d ncol=%d",nrow,ncol);
ord_min=cpl_table_get_column_min(*ord_tbl,"ORDER");
ord_max=cpl_table_get_column_max(*ord_tbl,"ORDER");
nb_order=ord_max-ord_min+1;
*reg_tbl=cpl_table_new(100);
cpl_table_new_column(*reg_tbl,"ORDER",CPL_TYPE_INT);
cpl_table_new_column(*reg_tbl,"RMS",CPL_TYPE_DOUBLE);
row = 0;
selected=1;
for (order=0; order<nb_order; order++) {
double cnt=0., sx=0., sy=0., sx2=0., sxy=0., sy2 = 0.;
order_nb=cpl_table_get_int(*ord_tbl,"ORDER",row,&null);
int present_order = order_nb;
while (present_order == order_nb) {
if (selected) {
x=cpl_table_get_double(*ord_tbl,"X",row,&null);
y=cpl_table_get_double(*ord_tbl,"Y",row,&null);
cnt += 1., sx += x, sy += y, sx2 += x*x, sy2 += y*y, sxy += x*y;
}
if (row >= (nrow-1)) break;
row++;
present_order=cpl_table_get_int(*ord_tbl,"ORDER",row,&null);
}
if (cnt >= 3) {
det = cnt*sx2 - sx*sx;
a = (sy*sx2 - sx*sxy)/det;
b = (cnt*sxy - sx*sy)/det;
rms = (sy2 - a*a*cnt - 2.*b*a*sx - b*b*sx2)/cnt;
if (rms < 0. && rms > -0.05) rms = 0.;
rms = sqrt(rms);
}
else rms = 99999.;
cpl_table_set_int(*reg_tbl,"ORDER",order,order_nb);
cpl_table_set_double(*reg_tbl,"RMS",order,rms);
}
cpl_table_erase_invalid_rows(*reg_tbl);
uves_msg_debug("end %s",__func__);
return 0;
}
/**@}*/
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