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. It's free! Though not actually associated with the GNU project or the FSF (Free Software Foundation).It's widely used, so there are many, many tutorials and references around for gnuplot (including this one).The learning curve isn't nearly as steep as you'd think with it being a command-line-only interface.
![gnuplot curve fitting gnuplot curve fitting](https://i.stack.imgur.com/pFVUW.png)
![gnuplot curve fitting gnuplot curve fitting](https://i.stack.imgur.com/qlWIn.png)
It is scriptable - that is, you can spend a little bit of time getting your graph to look just the way you want it, then you have a script that will work for whatever data sets you have.
![gnuplot curve fitting gnuplot curve fitting](https://i.stack.imgur.com/3TBUa.png)
You may ask, why pick gnuplot over some of the other plotting alternatives like Excel (or some other spreadsheet), origin, matplotlib, etc.? I'll try to list some of the reasons I can think of, starting with the most important: