The gnuplot_i++ C++ interface to gnuplot easily displays configurations produced by Monte Carlo simulation.

• gnuplot itself is commonly installed on unix systems. It is easily installed in a user directory on beowulf. The precompiled binary is available from http://www.gnuplot.info/. Images shown here are from version 3.8. (4.0 is current, released 4/16/2004).
• C++ subprograms were written by Rajarshi Guha to execute gnuplot commands. The C++ package gnuplot_i++.tgz is available from http://jijo.cjb.net/code/c++. It contains simply
  1. header file
  2. sample program
  3. Makefile
  4. c++ file of gnuplot functions
     

     Gnuplot	initialize
     cmd	send a command to gnuplot
     set_style	set line style
     set_xlabel	set x axis label
     set_ylabel	set y axis label
     plot_x	plot a single vector
     plot_xy	plot x,y pairs
     plot_slope	plot an equation y = ax + b
     plot_equation	plot an equation supplied as a string
     reset_plot	clear the plot area

• A short c++ program plots lattice gas configurations that were generated during Monte Carlo simulation on beowulf.
  Here are some sample configurations.

  64X64 triangular lattice, freezing	32X32 square lattice, frozen	32X32 hexagonal lattice, gaseous

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go back to MPI on beowulf at VDIL index.