To plot "normal" functions of a single variable, the independent variable should always be x. You can plot functions in one of two ways. Thus, you can either plot 2 items in the same plot command viaĮach plot command will completely erase any plot command(s) that came before it. The replot command will re-run the last plot command, but also takes the same arguments that plot takes. This section deals with creating plots in gnuplot. ** exponential operator (a ** b is a raised to the power of b) log natural logarithm log10 logarithm base 10 sin, cos, tan normal trig functions sine, cosine, tangent sinh, cosh, tanh hyperbolic trig functions asin, acos, atan arc-trig functions asinh, acosh, atanh arc-hyperbolic trig functions gamma gamma function erfc complementary error function erf error function ceil ceiling function (smallest integer greater than or equal to value) floor floor function (largest integer less than or equal to value) Very Basic Plotting (and Replot) in gnuplot I omit here the operators that are obvious, like +, -, /, and *. Gnuplot> List of operators and functions gnuplot knows about You can execute some shell commands (like ls), using the ! operator first. Say, for instance, you forgot the name of the data file you wanted to plot, etc.) Sometimes you may find yourself wishing you could run a shell command while inside gnuplot. Executing Basic Shell Commands in GNUPLOT This is done merely by isolating them from other items with commas.Įtc. It is also possible to define functions and parameters on the `plot` command In part earlier in the stream of `gnuplot` commands (see `user-defined`). The expressions may be defined completely or A function is a mathematical expression or a pair of mathematicalĮxpressions in parametric mode. Where either a or the name of a data file enclosed in quotes is Furthermore, `plot`'s `axes` option does not exist for `splot`. Work for both `plot` and `splot`, there are small differences between these Note specifically that although the `binary ` variation does `plot` and `splot` contain many common features see `splot` for differences. `plot` is used to draw 2-dįunctions and data `splot` draws 2-d projections of 3-d surfaces and data. Plots of functions and data in many, many ways. `plot` is the primary command for drawing plots with `gnuplot`. If it is available, you should see something like You can run gnuplot straight from a terminal (command-line) using the command gnuplot. fonts folder in my home directory with all of my fonts in it, so I would setĮxport GDFONTPATH=$HOME/.fonts Running GNUPLOT and Getting Help Using Cygwin on the PC, a typical choice isĮxport GDFONTPATH=/cygdrive/c/Windows/Fonts If you want to expand the fonts that gnuplot knows about when printing image files (like GIF, PNG, JPG, etc.), you need to set the GDFONTPATH environment variable to point to directories that contain font files. It's license is slightly more restrictive, not allowing you to actually distribute your own modified versions of gnuplot - though you can distribute patches to modify certain versions.
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