histogram.c

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/* 
Copyright 2021 Arizona Board of Regents on behalf of the University of Arizona.

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the Software please contact the University of Arizona at Tech Launch Arizona:
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of this software and associated documentation files (the "Software"), to deal
in the Software without restriction for non-commercial use educational and
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in all copies or substantial portions of the Software.

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 */


#include <gsl/gsl_histogram.h>

#include "extern.h"

struct HISTO_INFO last_histo;

int dummie_main (int argc, char **argv)
{
  double a, b;
  size_t n;

  if(argc != 4)
  {
    printf ("Usage: gsl-histogram xmin xmax n\n"
    "Computes a histogram of the data "
    "on stdin using n bins from xmin "
    "to xmax\n");

    exit (0);
  }

  a = atof(argv[1]);
  b = atof(argv[2]);
  n = atoi(argv[3]);

  {
    double x;

    gsl_histogram * h = gsl_histogram_alloc (n);
    gsl_histogram_set_ranges_uniform (h, a, b);

    while (fscanf (stdin, "%lg", &x) == 1)
    {
      gsl_histogram_increment (h, x);
    }

    gsl_histogram_fprintf (stdout, h, "%g", "%g");
    gsl_histogram_free (h);
  }

  exit (0);
}


int computeHistoRMS(h)
struct HISTO_INFO *h;
{
  int i, k, n;
  float f[MAX_HISTO_LENGTH], rms;
  double total=0.0;

  n = h->num;

  for(i=0;i<n;i++)
  {
    f[i] = h->ydata[i] - h->gdata[i];
    total += h->gdata[i];
  }

  if(isSet(PF_V_FLAG))
  {
    k = 0;
    for(i=0;i<n;i++,k++)
    {
      if(k > 9)
      {
        st_print("\n");
        k = 0;
      }

      st_print("%9.4f ", f[i]);
    }

    st_print("\n");
  }

  computeRms(f, n, &rms);

  st_report("Histogram rms:           %11.6f", rms);
  st_report("Histogram moment:        %11.6f", total);
  st_report("Histogram Percent:       %11.6f", rms / total * 100.0);

  return(0);
}


int doHistogram()
{
  int i, n;
  double min, max;
  struct HISTO_INFO *h;
  gsl_histogram *histo;

  if(args->ntokens < 2)
  {
    printH_FlagHelp("histogram");

    return(1);
  }

  n = atoi(args->secondArg);

  if( n <= 10 || n >= MAX_HISTO_LENGTH)
  {
    printH_FlagHelp("histogram");

    return(1);
  }

  min = h0->datamin ;
  max = h0->datamax ;

  if(min > 0.0 || max < 0.0)
  {
    st_fail("Please remove a DC offset first");
    return(0);
  }

  histo = gsl_histogram_alloc(n);
  gsl_histogram_set_ranges_uniform(histo, min, max);

  for(i=0;i<h0->head.noint;i++)
  {
    gsl_histogram_increment(histo, (double)h0->yplot1[i]);
  }

  if(isSet(PF_W_FLAG))
  {
    char fname[256];
    FILE *fp;

    sprintf(fname, "histo.dat");

    if((fp = fopen(fname, "w") ) <= (FILE *)0)
    {
      st_fail("Unable to open %s", fname);

      return(1);
    }

    gsl_histogram_fprintf(fp, histo, "%g", "%g");

    fclose(fp);

    st_report("Histogram Written to %s", fname);
  }

  h = &last_histo;

  bzero((char *)h, sizeof(*h));

  strcpy(h->magic, "HISTOGRAM");

  bcopy((char *)&h0->head, (char *)&h->head, sizeof(struct HEADER));
  h->plotwin = env->plotwin;

  for(i=0;i<n;i++)
  {
    h->xdata[i] = histo->range[i];
    h->ydata[i] = histo->bin[i];
  }

  h->num = n;

  st_report("Histogram Max:           %11.6f", gsl_histogram_max_val(histo));
  st_report("Histogram Min:           %11.6f", gsl_histogram_min_val(histo));
  st_report("Histogram Mean:          %11.6f", gsl_histogram_mean(histo));
  st_report("Histogram Sigma:         %11.6f", gsl_histogram_sigma(histo));
  st_report("Histogram Sum:           %11.6f", gsl_histogram_sum(histo));


  if(isSet(PF_G_FLAG))
  {
    int    pgauss, h1gauss, h2gauss, ret;
    double xd[MAX_HISTO_LENGTH], yd[MAX_HISTO_LENGTH], sig[MAX_HISTO_LENGTH];
    double a[4], dyda[4], y;

    pgauss = gsl_histogram_max_bin(histo);

    h1gauss = pgauss - (n/8);
    h2gauss = pgauss + (n/8);

    for(i=0;i<n;i++)
    {
       xd[i] = h->xdata[i];
       yd[i] = h->ydata[i];
      sig[i] = 1.0;
    }

    a[0] = 0.0;
    a[1] = yd[pgauss];
    a[2] = xd[pgauss];
    a[3] = fabs(xd[h1gauss]-xd[h2gauss]);

    st_report("Histogram Gauss Input:   %11.6f %11.6f %11.6f", a[1], a[2], a[3]);

    /* computer gaussian using Temp / Channel */
    ret = gauss_fit(&xd[0], &yd[0], &sig[0], n-1, &a[0], isSet(PF_V_FLAG));

    if(ret)
    {
      st_report("Histogram Gauss Results: %11.6f %11.6f %11.6f", a[1], a[2], a[3]);

      for(i=0;i<n;i++)
      {
        fgauss(xd[i], &a[0], &y, &dyda[0]);
        h->gdata[i]  = y;
      }

      h->gset = 1;

      computeHistoRMS(h);
    }
  }

  if(xgraphic)
  {
    sock_write(xgraphic, (char *)h, sizeof(*h));
  }

  last_plot = LAST_PLOT_SPEC_HISTO;

  st_report("Sent Histogram to Xgraphics");

  gsl_histogram_free(histo);

  return(0);
}