Therefore we use the battery.dat file from gnuplots demo files that contains data about the dependence of the power of the battery on the resistance.
#GNUPLOT SET KEY CODE#
3 Plot of the data from plotting_data3.dat in two different styles ( code to produce this figure)Īnother common task is to plot data with errorbars. Using the same data as in the first plot of the gnuplot basics tutorial Plotting data we will get Fig. Plot 'plotting_data1.dat' with linespoints ls 1 Now we can plot our data with the linespoints style. We specify a point interval pi of -1 and a point size of 1.5, in addition we set the the gap to a point size of 3. Set style line 1 lc rgb '#0060ad' lt 1 lw 2 pt 7 pi -1 ps 1.5 The size of the gap can be set by the pointintervalbox property. But if we use the value -1 it tells Gnuplot to insert a little gap between the points and the line. This property plots not every single point, but only every second for a value of 2 and so on. there exists the property pointinterval (see the documentation) in combination with the plotting style linespoints. But with a little trick it is very easy to achieve. In Gnuplot exists no line style that can do this directly. 1 Plot of the data from plotting_data1.dat with non-coninuous lines between its points ( code to produce this figure) Even Emacs is using a variation of this idea.Fig.
#GNUPLOT SET KEY HOW TO#
In On Lisp, Paul graham uses "special" variable names in Chapter 18, where he shows how to use gensyms for special purposes, and also variables with special names like ?x. I didn't invent the idea of reusing keywords this way out of the blue. Overall this seems like an improvement to the DSL. Set colorbox vertical origin screen 0.9, 0.2, 0 size screen 0.05, 0.6, 0 front noinvert bdefault Set pm3d interpolate 1,1 flush begin noftriangles border lt black linewidth 0.5 dashtype solid corners2color mean Set style fill transparent solid 0.3 border Set object 1 rect fc rgb "gray" fillstyle solid 1.0 border -1 Set object 1 rect from screen 0, 0, 0 to screen 1, 1, 0 behind Set title "Interlocking Tori - PM3D surfacewith depth sorting and transparency" Set terminal pngcairo background "#ffffff" enhanced font "arial,9" fontscale 1.0 size 512, 384 (set colorbox vertical origin screen 0.9\, 0.2\, 0 size screen 0.05\, 0.6\, 0 front noinvert bdefault) (set pm3d interpolate 1\,1 flush begin noftriangles border lt black linewidth 0.500 dashtype solid corners2color mean) (set style fill transparent solid 0.30 border)
(set object 1 rect fc rgb \"gray\" fillstyle solid 1.0 border -1)
(set object 1 rect from screen 0\, 0\, 0 to screen 1\, 1\, 0 behind) use lisp code to create a gnuplot command (set title (: format "\"%s\"" (concat "Interlocking Tori - PM3D surface" "with depth sorting and transparency"))) (set terminal pngcairo background "#ffffff" enhanced font "arial,9" fontscale 1.0 size 512\, 384 ) Plot "Br.dat" volatile using 1:3 title 'Br f"' lt 1 lw 3, '' volatile using 1:2 title "Br f'" lt 1 lw 1, "Ta.dat" volatile using 1:3 title 'Ta f"' lt 2 lw 3, '' volatile using 1:2 title "Ta f'" lt 2 lw 1įinally, we can set the output to png, and run our program. Set title " Anomalous scattering factors " "Ta.dat" volatile using 1:3 title \'Ta f\"\' lt 2 lw 3\, \'\' volatile using 1:2 title \"Ta f\'\" lt 2 lw 1)) (plot "Br.dat" volatile using 1:3 title \'Br f\"\' lt 1 lw 3\, \'\' volatile using 1:2 title "Br f'" lt 1 lw 1\, On the other hand, we lose the documentation that would have come with a defvar, and we have to define a function to access the contents of that variable. On one hand, this "protects" the variable, and keeps it out of the global namespace. It is encapsulated, similar to if we defined a class in Python then made an instance of it with an attribute that was accessible only be instance methods. The enclosed variable gnuplot-commands is basically only accessible by these functions. We define one function to add commands to the list of commands, one to clear the commands, one to generate the gnuplot script as a string, and one to run the program. Here is a "let over lambda" that defines a few functions that encapsulate an enclosed variable gnuplot-commands. Then when you want to, run the commands.Ī more modern approach is to use a closure to encapsulate the commands. *gnuplot-cmds* and append commands to it. A classic way to do that in Emacs lisp is to make a global variable, e.g.
It would be nice to accumulate them in different forms, and when you want to run them all. A significant limitation of the previous DSL I wrote is that all the plotting commands have to go in one macro.