GenerateOutput ( plotFile ) // Close the plot file. AddDataset ( dataset ) // Open the plot file. Gnuplot is able to generate a graphic from a script file which allows for a sequence of commands. If file names are given on the command line, gnuplot loads and executes each file in. for ( x = - 5.0 x <= + 5.0 x += 1.0 ) // Add the dataset to the plot. DESCRIPTION Gnuplot is a command-driven interactive plotting program. SetStyle ( Gnuplot2dDataset :: LINES_POINTS ) double x double y // Create the 2-D dataset. To run a script called filename, you can type gnuplot filename. AppendExtra ( "set xrange " ) // Instantiate the dataset, set its title, and make the points be // plotted along with connecting lines. SetLegend ( "X Values", "Y Values" ) // Set the range for the x axis. SetTerminal ( "png" ) // Set the labels for each axis. SetTitle ( plotTitle ) // Make the graphics file, which the plot file will create when it // is used with Gnuplot, be a PNG file. In order to process these gnuplot control files, do the following: gnuplot t gnuplot t gnuplot t This should produce the following graphics files: plot-2d.png plot-2d-with-error-bars.png plot-3d.png You can view these graphics files in your favorite graphics viewer. Any command-line arguments are assumed to be names of files containing GNUPLOT commands, with the exception of standard X11 arguments, which are processed. shell script: /bin/bash gnuplot << EOF plot 'myfirstfile.dat' u 1:2 replot 'mysecondfile.dat' u 1:2 EOF Or you can write the commands for gnuplot into a separate file and pass the file name as a command line argument to gnuplot, e.g.
Std :: string fileNameWithNoExtension = "plot-2d" std :: string graphicsFileName = fileNameWithNoExtension + ".png" std :: string plotFileName = fileNameWithNoExtension + ".plt" std :: string plotTitle = "2-D Plot" std :: string dataTitle = "2-D Data" // Instantiate the plot and set its title. You can pass these as input to gnuplot as a 'here document'.
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