Version 2.4 Upgrade Information
Version 2.4 adds convenient graph highlighting and the ability to pick the line style used for your graphs,
so it's easier to match equations to graphs when there are multiple curves on the screen. It also adds support
for several more equation syntax options and fixes a number of little issues that uers have reported over the
Downloading the new version
Version 2.4 for Windows supports all modern 32-bit and 64-bit platforms: Windows XP through Windows 10.
Version 2.4 for Macintosh supports OS X 10.6 and newer. (The new popover error messages require 10.7.)
Please e-mail me at email@example.com if you find
anything about the new features that does not work as advertised, or if you find a regression in any existing feature.
- Version 2.4 for Windows uses the GDI+ graphics library, which is only included in Windows XP and later. (It will still run on Windows 2000 SP4,
but you'll need to download and install a number of updates from Microsoft first).
- Graph documents using more than 7 graph colors saved by version 2.4 will not load correctly in version 2.2--graphs using color slots 8-16 will be
assigned color slot 7. For best interoperability, uncheck "Save setup information with file" when saving documents you want to load in older versions.
- Version 2.2 and earlier may crash when reading a graphmat.ini file with a custom color scheme in it. If you wish to revert to 2.2 using a
graphmat.ini file written by 2.4, set you color scheme to one of the standard options (white, gray, black) before uninstalling 2.4.
What's new in version 2.4
See changes in version 2.3b and earlier patch releases...
- Curves are now highlighted as you mouse over them or select them in the
- Added Pick Line Style to the context menu for equations, allowing you
to choose from solid, dashed, dotted, and dash-dot line styles.
- Fixed-increment Cartesian, polar, and parametric graphs (i.e. with the
step rate specified as a third parameter in the domain) now display as
a series of points; point tables are aligned to display the same values.
- The parser now accepts functions run together with a single-variable
parameter, e.g. y=logx.
- Added support for specifying powers of functions before the parameter
e.g. y=sin^2x or y=cos²x
- Any equation/inequality that is explicitly specified as x=f(y) is now
graphed as a function of y, even if it can be solved for y instead.
- Fixed bug which could cause graphs to be drawn slightly past the end of
their specified domain.
- Find All Graphs now adjusts the range based only on the requested domain
of the equations (rather than the maximum possible values that would be
visible on the screen with an unrestricted domain).
- Selection highlighting now uses a dark transparent overlay (instead of a
hard to see white overlay) for bright colors other than pure white.
- Fixed a number of issues with graphing inequalities like x < 1/y, where
it is important to evaluate asymptotes as a function of y instead of x.
- Fixed a problem which caused ODEs (and implicit Cartesian functions) to
fail to register (and later disappear) when evaluation failed due to a
non-fatal error (overflow, out of domain, etc.). They now just stop
drawing at that point.
- Eliminated extra vertical asymptote drawn as part of y=acot x.
- Fixed cubert(x) function to be defined for x < 0.
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Last updated: Sun 13 Dec 2014