plot.c

A Library of Efficient Data Types and Algorithms,封装了常用的ADT及其相关算法的软件包

#include <LEDA/basic.h>
#include <fstream.h>
#include "gnuplot.h"

using namespace leda;

#if defined(LEDA_STD_IO_HEADERS)
using std::cout;
using std::cin;
using std::cerr;
using std::flush;
using std::endl;
#endif


int main(int argc,char** argv)
{     	    		 	  

  if (argc < 2)
  { cerr << "usage: plot file1 file2 ...";
    return 1;
   }

  gnuplot_ctrl GP("gp");

  for(int num=1; num<argc; num++)
  {
    ifstream in_file(argv[num]);

    string title;
    string x_label;
    string y_label;
    string name;
  
    title.read_line(in_file);
    x_label.read_line(in_file);
    y_label.read_line(in_file);
    name.read_line(in_file); 

    int    size;
    in_file >> size;
  
    double* X = new double[size];
    double* Y = new double[size];
  
    for(int i=0; i<size; i++) in_file >> X[i] >> Y[i];
  
    if (num == 1)
    { GP.set_title(title);
      GP.set_xlabel(x_label);
      GP.set_ylabel(y_label);
      GP.set_style(gp_style::linespoints);
   
      double max_y = 0;
      double min_y = MAXINT;
      for(int i=0; i<size; i++)
      { double y = Y[i];
        if (y > max_y) max_y = y;
        if (y < min_y) min_y = y;
       }
    
      GP.set_xrange("*",string("%f",1.1*X[size-1]));
      GP.set_yrange("*",string("%f",1.1*max_y));
     }
        
    GP.plot_xy(X,Y,size,name);

    delete[] X;
    delete[] Y;
  
   }
  
  GP.set_timestamp();

  GP.set_terminal(gp_terminal::postscript);
  
  GP.set_output("gnuplot.ps");
  GP.replot();

  Yes("Hit <ENTER> to continue.");

  GP.close();

  return 0;
}