ZeGrapher is a free, open source and easy to use software for plotting mathematical objects. It can plot functions, sequences, parametric equations and data on the 2D plane.

Official website: https://zegrapher.com/

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Features

• Visualize functions by giving their "natural" equations (e.g. f(x) = 2+cos(x))
  • All the standard mathematical functions (cos cosh exp ...etc) can be used.
  • Any user defined function can be used.
• Visualize numerical sequences through specific equations
  • Defined by giving a list of expressions separated with , or ;
    • The last expression is the "generic" expression that is used for any other index that the first values.
    • If more than one expression is provided, the first expressions are considered as the first values of the sequence
  • Example: Fibonacci sequence u(n) = 0 ; 1 ; u(n-2) + u(n-2)
    • First values: 0, 1
    • Generic expression: u(n-2) + u(n-1)
• Can define "global constants", i.e. a variable that has an explicit numeric value without depending on any other object
  • Example pi = 3.14
  • Can be used for parametric plots of functions, sequences and parametric equations.
  • Can be made into "Schrodinger Constants" (Schrodinger cat icon): take many values at once and all dependent math objects will be plotted simultaneously for each value taken
• Can define "global variables", i.e. a function without input variables that can arbitrarily depend on other objects.
• Plotting of 2D data
  • Data can be imported from/exported to a CSV file.
    • Tested with CSV files with millions of cells
  • Excel-style table editing
    • Insert / (bulk) delete of rows
• Extensive tools for exports that look identical to the graph being previewed
  • Scalable (svg, pdf) and image (png, jpeg, bmp and ppm) formats
• Navigate on the graph
  • Select a curve to display the coordinates of its points.
  • Zoom/un-zoom
    • Globally using the scroll wheel
    • On each axis separately using CTRL + vertical/horizontal scroll
      • CTRL + SHIFT swaps vertical/horizontal scroll so regular (vertical) scroll can zoom the x axis only.
  • Move the graph.
• Customization
  • Change the grid ticks to be multiples of a given expression
    • e.g. multiples of π
  • Change colors: axes, background, functions...
  • Adjust the plotting precision (affects rendering speed);
  • Independent X/Y grid and sub-grid settings
    • Show / hide
    • Define number of subdivisions
  • Plot the graph on an orthonormal basis.
  • Set custom graph size
    • In real centimeters: can be measured on-screen and in exported vector medium (PDF and SVG)
    • In pixels
  • A global scaling factor to change how big everything is

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Download

ZeGrapher is available in the official repositories of Debian, Fedora, Ubuntu, FreeBSD. In the Archlinux (AUR). An AppImage is otherwise available, along with Windows and Mac versions in Zegrapher's Github releases page or at zegrapher.com.

Compile from sources

To compile from sources, ZeGrapher needs the following tools and libraries:

• C++ compiler: clang or gcc
• boost
• Qt
• meson

To build

meson setup build
cd build
meson compile
cd ..

This creates the ZeGrapher executable in build/src/ZeGrapher that you can directly run.

Packaging

• Linux
  • meson install should now be fully XDG compliant. Issues and/PRs welcome if something is missing.
  • Use deploy/linux-bundle-appimage.sh to create an AppImage.
• macOS
  • Use deploy/macos-bundle-dmg.sh to create an installer.
• Windows
  • Use deploy/windows-bundle-7z.sh (requires to be run from an MSYS2 terminal)