Draw mathematical graphs in a coordinate system, with Graph


Graph is a free and open source program that will let you draw mathematical graphs in a coordinate system. If you need to draw graphs of functions you will find this program useful. It is also possible to do some mathematical calculations on the functions.

Features: Graph can draw normal functions, parameter functions, and polar functions. You can use a lot of built-in functions, e.g. sin, cos, log, etc. You may specify color, width and line style of the graphs, and the graphs may be limited to an interval. It is also possible to show a circle at the ends indicating open or closed interval. Graph can show any equation and inequality, for example sin(x) < cos(y) or x^2 + y^2 = 25. You can choose line width and color for the equations, and color and shading style for the inequalities.

You can save the coordinate system with graphs as an image on disk either as a bitmap (bmp), Potable Network Graphics (png), JPEG, metafile (emf) or Portable Document Format (PDF). You may also copy the coordinate system into another program, e.g. Microsoft Word, either as a normal image or as an OLE object, which may be edited later by double clicking on it.

Customization includes fonts, colors, axes style, grids, etc. The axes, which may by normal or logarithmic, can be placed either by entering specific values, or by moving or zooming with the mouse. Given an x-coordinate Graph will calculate the function value and the first two derivatives for any given function. Alternatively the function may be traced with the mouse.

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