Lybniz is a simple mathematical function graph plotter.

Enter functions in Python syntax with x as the dependent variable. Press the

Constants and functions of the math module are available.

Examples:

```
x**3 - 2 * x
```

2 * cos(x)

e ** (x / -5) * sin(x)

To zoom in, activate the

The scale automatically adjusts as you zoom in and out. To switch between decimal and radian styles, use

If you wish to use a custom scale select

They can also be stated as expressions. Examples:

```
xMin = pi * -2
```

xMax = pi * 2

xScale = pi / 2

To save the graph in PNG format choose

Using

Accelerator | Function |
---|---|

Define functions | |

Zoom in | |

Zoom out | |

Reset zoom | |

Fullscreen | |

Menu |

Expressions are entered in python syntax. The following operators can be used.

Note: multiplication is not implied (use "2*x" not "2x")

Operator | Description |
---|---|

+, -, *, / | Plus, minus, multiply, divide |

// | Integer divide. (eg 3/2 = 1) |

**, ^ | Raise to the power of |

% | Remainder |

Lybniz has all the math functions of the python standard library available.

acos() | asin() | atan() |

atan2() | ceil() | cos() |

cosh() | degrees() | exp() |

fabs() | floor() | fmod() |

frexp() | hypot() | ldexp() |

og() | log10() | modf() |

pow() | radians() | sin() |

sinh() | sqrt() | tan() |

tanh() |

These are documented at Python Library Reference - Math.

There are also a few extra functions that may be useful.

Function | Description |
---|---|

fac(x) | Factorial of x (or x!). Note: only works with positive integers |

sinc(x) | sin(x)/x |

The constants pi and e can be used.

Lybniz was originally written by Thomas Führinger (ThomasFuhringer@Yahoo.com). It is now maintained by Sam Tygier (samtygier@yahoo.co.uk). Maemo port is made by Daniel Martín Yerga (dyerga@gmail.com). To find more information about Lybniz, please visit the Lybniz Web page.

This program is distributed under the revised BSD license.