GDF Plotter - Mathematical grapher

What is GDF

GDF is a freeware program that allows you to draw any single variable mathematical function, circumferences, ellipses, parabolas, hyperbolas and sheaves of functions on a Cartesian coordinate system.

For more information please refer to detail section in this page.

How to get this software

Please visit my download page

Details

Graph functions, circumferences, ellipses, parabolas, hyperbolas and function families.
Automatic scan relative maximum and minimum on a graph providing 15 digit precision float values.
Allows you to refer a function from other function formula and setting input values,. i.g. a(x)=x+1, b(x)=a(x)+1 ; c(x)=a(3)+1. Note: Cannot nest function, i.g. d(x)=a(b(x)) is not valid.
Show a tendency icon (increasing/decreasing) when traversing graphics.

How to use GDF

The Graph Manager window shows a list of graphics to be represented on the same Cartesian system of coordinates by clicking the 'Graph' button. It allows you to easily add, edit, or remove selected graphics. It also provides a way to adjust the range (initial and final value for x and y), quality (the more values are calculated to define a graphic, the more well shaped it would look, however while graphing sheaves one may be interested in speed up the drawing), and ruler (define how many real numbers represent a mark on each axis).

Defining or editing a graphic is easy by means of the Edition Object window as shown below. You just click type of graph you want to create or edit and fill the form specifying value such as the coordinate for the focus, center, etc. It assumes you're familiarized with descriptive geometry concepts and curves definition.

Agregando un gráfico a la lista

How to use insert menu

In order to insert functions such as 'log','exp', etc, while editing, you can select part of the text of the equation using the mouse and click on the built-in function you want to apply it, using the 'insert' menu. In example, if you wrote x^2+x+1 and want to get x^2+log (x+1): you must paint "x+1" form first equation and click 'logarithm' from insert menu.

Built-in functions and operators

Functions		Operators
*abs*	Absolute value	!	Factorial
*atn*	Arctangent	^	Power
*cos*	Cosine	*	Multiply
*exp*	Powered number 'e'	/	Division
*gamma*	Gamma function	\	Integer División (result will be truncated)
*inv*	Inverse	-	Substract
ln	Napierian Logarithm	+	Add
*lngamma*	Napierian Logarithm of function gamma	Note: All trigonometric functions works with decimal grades..
*log*	Logarithm base 10
*sqrt*	Squared root
*trpl*	Triple root
*sin*	Sine
*sgn*	Sign
*tan*	Tangent

License status

Permission enabled

Permission for users to run this software is updated every month.

For more information please check the licence of the product.

Donate 5€ to support the author on improving and mainteining this free software.

Daniel Manta Barbieri
London, United Kingdom
d_manta@hotmail.com