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bayesSource.c
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Fri, Nov 29, 12:24

bayesSource.c
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#include<stdio.h>
#include<signal.h>
#include<stdlib.h>
#include<string.h>
#include<math.h>
#include "dimension.h"
#include "structure.h"
#include "constant.h"
#include "fonction.h"
#include "bayesChires.h"
#include "lt.h"
/******************************************************************************
* Name: bayesSource.c
* Authors: EJ
* Date: 12/09/07
*
* Analyse a bayes.dat file and compute a source.dat file for each line.
*
* syntax : bayesSource <.par>
*
* The bayes.dat file in the current directory is used.
* Output : source??.dat
*
******************************************************************************/
typedef void (*sighandler_t)(int);
static void signalReset();
static void barysource(struct galaxie *source,long int ns, struct point *bsource);
int optInterrupt;
int main( int argc, char** argv )
{
extern long int narclet;
struct point bsource[100];
double **array; // contains the bayes.dat data
int nParam; // size of array
long int iVal, nVal;
char fname[40]; // source<ival>.dat
int nbs; // number of systems (barycenter source)
int i,j;
double dx, dy;
FILE *bayes;
// Check the arguments
if( argc < 2 ||
strstr( argv[1], ".par" ) == NULL )
{
fprintf(stderr, "Syntax : bayesSource <.par>\n");
return 1;
}
// Read the .par file
init_grille( argv[1], 1);
// Read catalog of multiple images
if( M.imafile[0] == '\0' )
{
fprintf(stderr, "ERROR: keyword image not defined\n");
return 1;
}
narclet = 0;
f_shape( &narclet, arclet, M.imafile, 0 );
pro_arclet(narclet, arclet);
for( i = 0; i < narclet; i++ )
dratio_gal(&arclet[i], lens[0].z);
// Initialise the grid
if( G.pol != 0 )
gridp();
else
grid();
// Switch to silent mode
M.verbose = 0;
M.image = 1; // to cheat the e_lensing print out
if( G.nmsgrid != G.nlens )
{
prep_non_param();
}
// Read the bayes.dat file
array = readBayesModels(&nParam, &nVal);
if( array == NULL )
{
fprintf(stderr, "ERROR: bayes.dat file not found\n");
return 1;
}
i = system("mkdir -p source");
// Write the header of the bayesSource.dat file
bayes = fopen( "bayesSource.dat", "w" );
fprintf( bayes, "#Nsample\n");
fprintf( bayes, "#Chi2\n");
for( i = 0; i < narclet; i++ )
fprintf( bayes, "#Distance(I_%s - <S>)\n", arclet[i].n);
// Handle CTRL-C to interrupt the optimisation but not lenstool
signal(SIGINT, signalReset);
optInterrupt = 0;
// Loop over each line
for( iVal = 0; iVal < nVal && !optInterrupt; iVal++ )
{
// Set the lens parameters from <array>
setBayesModel( iVal, nVal, array );
printf( "INFO: Compute the source.dat file %ld/%ld [CTRL-C to interrupt]\r", iVal+1, nVal);
fflush(stdout);
// arclet --> source list
S.ns = 0; e_unlens(narclet, arclet, &S.ns, source);
// source list --> barycenter source list
barysource(source, S.ns, bsource);
// print a line in bayesSource.dat
fprintf( bayes, "%ld %lf ", iVal, array[0][iVal] );
for( i = 0; i < narclet; i++ )
{
dx = arclet[i].C.x-bsource[i].x;
dy = arclet[i].C.y-bsource[i].y;
fprintf(bayes, "%lf ", sqrt( dx*dx + dy*dy)/arclet[i].dr );
}
fprintf( bayes, "\n" );
fflush(bayes);
// write source array
sprintf( fname, "source/source%ld.dat", iVal );
ecrire_r(0,S.ns,source,fname,2);
}
printf( "\n" );
fclose(bayes);
free( array );
return 0;
}
static void signalReset()
{
signal(SIGINT, SIG_DFL);
optInterrupt = 1;
printf( "\nINFO: Optimisation interrupted by CTRL-C\r");
}
// For each system return in bsource the barycenter source
static void barysource(struct galaxie *source, long int ns,
struct point *bsource)
{
int i,j;
double xs, ys, n;
xs = ys = 0.;
n = 0.;
for( i = 0; i < ns-1; i++ )
{
xs += source[i].C.x;
ys += source[i].C.y;
n++;
if( indexCmp(source[i].n,source[i+1].n) )
{
for( j = i-n+1; j <= i; j ++)
{
bsource[j].x = xs / n;
bsource[j].y = ys / n;
}
n = 0.;
xs = ys = 0.;
}
}
// Fill the last system
xs += source[i].C.x;
ys += source[i].C.y;
n++;
for( j = ns-n; j < ns; j ++)
{
bsource[j].x = xs / n;
bsource[j].y = ys / n;
}
}

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