Descartes is a small software which you can use to draw graphs of mathematical functions.

You do not choose from a limited set of offered functions - an expression evaluator can deal with an extremely wide range of expressions from simple polynomials, trigonometric, hyperbolic, exponential terms, differentials and integrals, and sums and products of series.

What's New in This Release: [ read full changelog ]

· File.. New and File..Save

· Memo - this is some text saved with a file, giving an explanation or notes about the idea behind the file contents. The memo is displayed when the file loads, and can be reviewed/edited from the menu Memo option.
· Files remember the 'context' of what was saved eg polar or parametric functions, and the appropriate dialog box is displayed when the file opens.


· Mouse right-click on the graph background offers various options, some of which are obvious - zoom in and out, centre, and reset graph limits to the original : +/- 5. The non-obvious options will display a chord on a function, showing the 'rise and run', and the slope of the chord as 'rise over run'.

· With appropriate zoom in, continuous functions become locally straight, and the chord slope becomes the function differential coefficient. The other options enable the user to select where (what x value) the chord is shown at, or to use the next function, if several functions are being displayed.
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