exprtk_gnuplot_fx Class Reference

Public Member Functions
	exprtk_gnuplot_fx ()
exprtk_gnuplot_fx &	set_title (const std::string &title)
exprtk_gnuplot_fx &	set_domain (const double min_x, const double max_x)
exprtk_gnuplot_fx &	set_expression (const std::string &expression)
bool	plot ()
bool	plot ()
exprtk_gnuplot_fx &	add_curve (const exprtk_fx_curve &curve)

Private Member Functions
bool	generate_gp_script ()
bool	generate_data ()
bool	generate_gp_script ()
bool	generate_data (const std::size_t index, exprtk_fx_curve &curve)

Private Attributes
std::string	title_
std::string	expression_
double	min_x_
double	max_x_
double	min_y_
double	max_y_
std::deque< exprtk_fx_curve >	curve_list_

Detailed Description

Definition at line 29 of file exprtk_gnuplot.cpp.

Constructor & Destructor Documentation

exprtk_gnuplot_fx()

exprtk_gnuplot_fx::exprtk_gnuplot_fx ( )

inline

Definition at line 33 of file exprtk_gnuplot.cpp.

   : min_x_(0.0)
   , max_x_(0.0)
   , min_y_(0.0)
   , max_y_(0.0)
   {}

Member Function Documentation

add_curve()

exprtk_gnuplot_fx & exprtk_gnuplot_fx::add_curve ( const exprtk_fx_curve &  curve )

inline

Definition at line 81 of file exprtk_gnuplot_multi.cpp.

   {
      curve_list_.push_back(curve);
      return *this;
   }

References curve_list_.

Referenced by main().

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generate_data() [1/2]

bool exprtk_gnuplot_fx::generate_data ( )

inlineprivate

Definition at line 89 of file exprtk_gnuplot.cpp.

   {
      typedef exprtk::symbol_table<double> symbol_table_t;
      typedef exprtk::expression<double>   expression_t;
      typedef exprtk::parser<double>       parser_t;
 
      double x = 0.0;
 
      symbol_table_t symbol_table;
      symbol_table.add_constants();
      symbol_table.add_variable("x",x);
 
      expression_t expression;
      expression.register_symbol_table(symbol_table);
 
      parser_t parser;
 
      if (!parser.compile(expression_,expression))
      {
         return false;
      }
 
      std::ofstream stream("data.dat");
 
      if (!stream)
      {
         return false;
      }
 
      min_y_ = +std::numeric_limits<double>::max();
      max_y_ = -std::numeric_limits<double>::max();
 
      stream << std::setprecision(10);
 
      const double increment = std::min(0.00005,std::abs(max_x_ - min_x_) / 1000.0);
 
      for (x = min_x_; x <= max_x_; x += increment)
      {
         const double y = expression.value();
 
              if (y < min_y_) min_y_ = y;
         else if (y > max_y_) max_y_ = y;
 
         stream << x << "\t" << y << "\n";
      }
 
      const double diff_y  = std::abs(max_y_ - min_y_);
      const double perc7_5 = diff_y * 0.075; //7.5%
 
      min_y_ -= perc7_5;
      max_y_ += perc7_5;
 
      return true;
   }

References expression_, max_x_, max_y_, min_x_, and min_y_.

Referenced by plot().

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generate_data() [2/2]

bool exprtk_gnuplot_fx::generate_data ( const std::size_t  index, exprtk_fx_curve &  curve  )

inlineprivate

Definition at line 130 of file exprtk_gnuplot_multi.cpp.

   {
      typedef exprtk::symbol_table<double> symbol_table_t;
      typedef exprtk::expression<double>   expression_t;
      typedef exprtk::parser<double>       parser_t;
 
      double x = 0.0;
 
      symbol_table_t symbol_table;
      symbol_table.add_constants();
      symbol_table.add_variable("x",x);
 
      expression_t expression;
      expression.register_symbol_table(symbol_table);
 
      parser_t parser;
 
      if (!parser.compile(curve.expression_,expression))
      {
         return false;
      }
 
      const std::string file_name = std::string("data.dat") + (char)('0' + index);
 
      std::ofstream stream(file_name.c_str());
 
      if (!stream)
      {
         return false;
      }
 
      curve.min_y_ = +std::numeric_limits<double>::max();
      curve.max_y_ = -std::numeric_limits<double>::max();
 
      stream << std::setprecision(10);
 
      const double increment = std::min(0.00005,std::abs(curve.max_x_ - curve.min_x_) / 1000.0);
 
      for (x = curve.min_x_; x <= curve.max_x_; x += increment)
      {
         const double y = expression.value();
 
              if (y < curve.min_y_) curve.min_y_ = y;
         else if (y > curve.max_y_) curve.max_y_ = y;
 
         stream << x << "\t" << y << "\n";
      }
 
      const double diff_y  = std::abs(curve.max_y_ - curve.min_y_);
      const double perc7_5 = diff_y * 0.075; //7.5%
 
      curve.min_y_ -= perc7_5;
      curve.max_y_ += perc7_5;
 
      return true;
   }

References exprtk_fx_curve::expression_, exprtk_fx_curve::max_x_, exprtk_fx_curve::max_y_, exprtk_fx_curve::min_x_, and exprtk_fx_curve::min_y_.

generate_gp_script() [1/2]

bool exprtk_gnuplot_fx::generate_gp_script ( )

inlineprivate

Definition at line 69 of file exprtk_gnuplot.cpp.

   {
      std::ofstream stream("plot.gp");
 
      if (!stream)
      {
         return false;
      }
 
      stream << "set term png\n";
      stream << "set output 'plot.png'\n";
      stream << "set xrange[" << min_x_ << ":" << max_x_ <<"]\n";
      stream << "set yrange[" << min_y_ << ":" << max_y_ <<"]\n";
      stream << "set xzeroaxis\n";
      stream << "set yzeroaxis\n";
      stream << "plot 'data.dat' using 1:2:(1.0) smooth unique title '" << title_ <<"'\n";
 
      return true;
   }

References max_x_, max_y_, min_x_, min_y_, and title_.

Referenced by plot().

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generate_gp_script() [2/2]

bool exprtk_gnuplot_fx::generate_gp_script ( )

inlineprivate

Definition at line 89 of file exprtk_gnuplot_multi.cpp.

   {
      std::ofstream stream("plot.gp");
 
      if (!stream)
      {
         return false;
      }
 
      double min_x = +std::numeric_limits<double>::max();
      double max_x = -std::numeric_limits<double>::max();
      double min_y = +std::numeric_limits<double>::max();
      double max_y = -std::numeric_limits<double>::max();
 
      for (std::size_t i = 0; i < curve_list_.size(); ++i)
      {
         exprtk_fx_curve& curve = curve_list_[i];
 
         if (curve.min_x_ < min_x) min_x = curve.min_x_;
         if (curve.max_x_ > max_x) max_x = curve.max_x_;
         if (curve.min_y_ < min_y) min_y = curve.min_y_;
         if (curve.max_y_ > max_y) max_y = curve.max_y_;
      }
 
      stream << "set term png\n";
      stream << "set output 'plot.png'\n";
      stream << "set xrange[" << min_x << ":" << max_x <<"]\n";
      stream << "set yrange[" << min_y << ":" << max_y <<"]\n";
      stream << "set xzeroaxis\n";
      stream << "set yzeroaxis\n";
      stream << "plot \\\n";
 
      for (std::size_t i = 0; i < curve_list_.size(); ++i)
      {
         stream << "'data.dat" << i << "' using 1:2:(1.0) smooth unique title '" << curve_list_[i].title_;
         stream << (((i + 1) < curve_list_.size()) ? "',\\\n"  : "'\n");
      }
 
      return true;
   }

References curve_list_, exprtk_fx_curve::max_x_, exprtk_fx_curve::max_y_, exprtk_fx_curve::min_x_, and exprtk_fx_curve::min_y_.

plot() [1/2]

bool exprtk_gnuplot_fx::plot ( )

inline

Definition at line 59 of file exprtk_gnuplot.cpp.

   {
      if (!generate_data())
         return false;
      else
         return generate_gp_script();
   }

References generate_data(), and generate_gp_script().

Referenced by main().

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plot() [2/2]

bool exprtk_gnuplot_fx::plot ( )

inline

Definition at line 70 of file exprtk_gnuplot_multi.cpp.

   {
      for (std::size_t i = 0; i < curve_list_.size(); ++i)
      {
         if (!generate_data(i,curve_list_[i]))
            return false;
      }
 
      return generate_gp_script();
   }

References curve_list_, generate_data(), and generate_gp_script().

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set_domain()

exprtk_gnuplot_fx & exprtk_gnuplot_fx::set_domain ( const double  min_x, const double  max_x  )

inline

Definition at line 46 of file exprtk_gnuplot.cpp.

   {
      min_x_ = min_x;
      max_x_ = max_x;
      return *this;
   }

References max_x_, and min_x_.

Referenced by main().

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set_expression()

exprtk_gnuplot_fx & exprtk_gnuplot_fx::set_expression ( const std::string &  expression )

inline

Definition at line 53 of file exprtk_gnuplot.cpp.

   {
      expression_ = expression;
      return *this;
   }

References expression_.

Referenced by main().

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set_title()

exprtk_gnuplot_fx & exprtk_gnuplot_fx::set_title ( const std::string &  title )

inline

Definition at line 40 of file exprtk_gnuplot.cpp.

   {
      title_ = title;
      return *this;
   }

References title_.

Referenced by main().

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Member Data Documentation

curve_list_

std::deque<exprtk_fx_curve> exprtk_gnuplot_fx::curve_list_

private

Definition at line 187 of file exprtk_gnuplot_multi.cpp.

Referenced by add_curve(), generate_gp_script(), and plot().

expression_

std::string exprtk_gnuplot_fx::expression_

private

Definition at line 145 of file exprtk_gnuplot.cpp.

Referenced by generate_data(), and set_expression().

max_x_

double exprtk_gnuplot_fx::max_x_

private

Definition at line 147 of file exprtk_gnuplot.cpp.

Referenced by generate_data(), generate_gp_script(), and set_domain().

max_y_

double exprtk_gnuplot_fx::max_y_

private

Definition at line 149 of file exprtk_gnuplot.cpp.

Referenced by generate_data(), and generate_gp_script().

min_x_

double exprtk_gnuplot_fx::min_x_

private

Definition at line 146 of file exprtk_gnuplot.cpp.

Referenced by generate_data(), generate_gp_script(), and set_domain().

min_y_

double exprtk_gnuplot_fx::min_y_

private

Definition at line 148 of file exprtk_gnuplot.cpp.

Referenced by generate_data(), and generate_gp_script().

title_

std::string exprtk_gnuplot_fx::title_

private

Definition at line 144 of file exprtk_gnuplot.cpp.

Referenced by generate_gp_script(), and set_title().

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The documentation for this class was generated from the following files:

• exprtk/exprtk_gnuplot.cpp
• exprtk/exprtk_gnuplot_multi.cpp