Linux Journal | January 2013 | Issue 225 - ACM Digital Library

[ UPFRONT ]Figure 4. Gnuplot even can handle 3-D plots.splot functions. As an example,say you have a data file that hasthe temperature and pressurefor each day. You can plot thetemperature with:plot "weather.dat" using 1:2 title "Temperature"If you want to get the pressuregraph, you would use:plot "weather.dat" using 1:3 title "Pressure"If you want to plot all threecolumns, you can use:splot "weather.dat"There are two ways ofcustomizing your plots when usinggnuplot. The first is to use optionsto the plot and splot commands.In this case, you define things likethe title of the plot, the axes orthe style. The styles available can28 / JANUARY 2013 / WWW.LINUXJOURNAL.COM