WZGrapher Function Grapher WZGrapher Function Graph Program
WZGrapher Funktionsgraphen -Plotter

WZGrapher Function Grapher
Developer: Walter Zorn
WZGrapher is an easy-to-use and small-footprinted Function Graphing and Calculation Program written in C language, with capabilities to plot both cartesian and polar functions. WZGrapher can also be used to graph numerical solution curves of integrals, to solve numerically and to graph ordinary differential equations up to the fifth order, and to calculate value tables (also of ODEs) including the first derivative values.
You can simply enter expressions like x^3 - 2 x^2ln(sin(x-Pi/2)) or pi*sin(2t + sin(t)), the latter being designated as polarfunction by 't' used as independent variable. Differential equations (ODE) may look like y'' = -xy' + 3y, for example.
WZGrapher Function Graph Program
WZGrapher comes with various built-in helperfunctions, such as all of the 12 trigonometric and hyperbolic functions, e.g. tanh{512 * [2 - cosh(sin(x))^3]},
their inverses, e.g. acosh(x) (inverse hyperbolic cosine),
logarithms with specifiable bases, e.g. logn(x, 15.4),
Exponential Function exp(x),
roots with specifiable index, e.g. root(2.5x, 5),
the Gamma Function,
complete as well as incomplete elliptic integrals,
and several more.
WZGrapher: Graph Functions  
WZGrapher Function Grapher: English VersionWZGrapher Function Grapher: English Version
WZGrapher Funktionsgraphen -Plotter: Deutsche Version

Compared with the Online Function Grapher, the WZGrapher Function Graphing software is much faster, can be customized in multiple ways, and provides extended capabilities, such as:
Zooming and scrolling the displayed range via keyboard (+, -, arrow keys), toolbar, or menu, selecting a zooming rectangle with the mouse.
WZGrapher Function Graphing Application: Integration Numerically computing integrals, and drawing their integral curves.
Numerically computing derivatives with the d( ) helperfunction, e.g. y=d(d(x^3)) (second derivative of x^3).
Numerically solving ordinary differential equations (ODE) of the first, second, third, fourth and fifth order, WZGrapher Function Plotting Program: Plot of an ODE (ordinary differential equation) e.g. y'''' = -y^2 - xy'', and drawing their solution curves. When using WZGrapher to solve initial value problems, the basic value (the point through which the solution graph must pass) can be defined anywhere inside the desired solution range of x.
Saving your work as WZG files.
Copying and pasting graphs into other applications such as Office Suites, Graphics Programs and Image Viewer.
Saving graphs as pictures (BMP or GIF) to disk.
Textboxes for numbers, such as x min and x max, accept mathematical expressions, e.g. pi/2 or 2*sqrt(10).
Switching the background colour, specifying the line thickness.
Accessing operations via right-click menu (context menu), keystrokes or even Mouse Gestures.
Function calculator.
Can evaluate single values as well as value tables, including first derivative values. These values/tables can be directly copied to the clipboard via a buttonclick, and hence be pasted into other programs or documents such as Excel spreadsheets etc.
WZGrapher: Value Table
Despite these and more features, the size of the WZGrapher Function Graphing application is still very small, just 100 kB (download size: 114 kB), and memory usage is quite frugal (though I doubt anybody cares).
WZGrapher: Graph Functions  
Top of Page

Integral Screen Shot

WZGrapher Function Graph Plotter: Integral Curve
WZGrapher: Graph Functions  
Top of Page

Differential Equation Screen Shot

Solution curve of a differential equation (ODE) of the second order
WZGrapher Function Graphing Program,: Solve Differential Equation
WZGrapher: Graph Functions  
Top of Page

Installation of WZGrapher

No installation required.
Download the ZIP file in your preferred language and unzip it to the directory you wish. On Windows 2000 / XP it's recommended to start WZGrapher (wzgrapher.exe) the first time from an useraccount with Administrator rights, in order to enable WZGrapher to be lauched by clicking on a WZG file or by typing 'wzgrapher' on the command prompt.
To uninstall WZGrapher, delete the file wzgrapher.exe or the directory containing it.


Changelog of WZGrapher.
If you're impatiently waiting for the next release :-): I'm working on a major update of WZGrapher. Some of the new features to come:
Multi-document interface with tabs re-arrangable via drag&drop. Editable language files so the program can be easily translated (even by users). Function list in the new sidebar, to quickly hide/show, edit and remove graphs, or to move a graph up/down in the stacking order. Style of graphs (color, line-thickness) can be set and changed individially. Difficult-to-graph functions such as sin(1/x) are displayed with more precision. Range of graphs can be restricted individually, e.g. to draw them only partially. Boolean operators <, <=, >, >= and <>, especially useful for conditional graphs when used in the x expression of the new if(x, a, b) function. Logical operators AND, OR, XOR and NOT. Summation with the new sum() function. Parametric functions (cartesian and polar). User-defined functions (if anything goes well). User-defined textlabels can be inserted, and moved. Graphs can be traced.

Free Download

Version 0.95 for Windows 98 / Me / NT4 / 2000 / XP:
English WZGrapher Function Grapher: Download WZGrapher Function Grapher wzgrapher_e.zip (114 kB)
Deutsch WZGrapher Funktionsgraphen -Plotter: Download wzgrapher.zip (114 kB)

Later there will probably also come a Linux version.
Windows 95 is no longer supported.
WZGrapher: Graph Functions  
Top of Page
Walter Zorn, Munich, 2006
visitors on www.walterzorn.com since 27. 12. 2002