GenerateOutput ( plotFile ) // Close the plot file. AddDataset ( dataset ) // Open the plot file. for ( x = - 5.0 x <= + 5.0 x += 1.0 ) // Add the dataset to the plot. There is a fairly comprehensive help system in gnuplot. We use C to generate data and command files to run the graphics package GNUPLOT. SetStyle ( Gnuplot2dDataset :: LINES_POINTS ) double x double y // Create the 2-D dataset. This tutorial is specifically for gnuplot 4.0, but should be useful for both earlier and later versions. Here is a way to get graphical output from C. Here are samples of PNG output from some of the demos. AppendExtra ( "set xrange " ) // Instantiate the dataset, set its title, and make the points be // plotted along with connecting lines. Gnuplot is distributed with a large set of demonstration scripts. (1) Line plot + error bars ggplot (df.summary2, aes (dose, len)) + geomline (aes (linetype supp, group supp))+ geompoint ()+ geomerrorbar ( aes (ymin len-sd, ymax len+sd, group supp), width 0. SetLegend ( "X Values", "Y Values" ) // Set the range for the x axis. dat file from your program, and then launch. Of course you could create the gpl script by yourself, save a. SetTerminal ( "png" ) // Set the labels for each axis. gpl gnuplot scripts directly from your cpp program. The first line tells gnuplot to use a comma instead of whitespace to seperate the data (thus parsing the csv). In X Terminal, run the following commands to prepare the gnuplot.gnu file: mkdir dse1 cd dse1 emacs gnuplot. SetTitle ( plotTitle ) // Make the graphics file, which the plot file will create when it // is used with Gnuplot, be a PNG file. Create a file named example.gnuplot in the same folder as your csv file and put the following in there: set datafile separator ',' plot plot.csv using 1:2 with lines, '' using 1:3 with lines. 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.
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