The Science Access Project has developed a fully accessible scientific graphing calculator implemented as a 32 bit Microsoft Windows application. Graphs may be printed to make tactile copy or "viewed" as a flexible audio tone graph. This program will be available for free download in the near future (anticipated beta release in 1999). The Graphing Calculator will be an integral part of Triangle for Windows. An active demonstration of the AudioPlot technology used for rendoring function plots is available on our web site. You must set your Internet Explorer browser on low security to download the ActiveX control used on this page.
In order to view this file with Netscape an ActiveX plugin is required. A plugin can be purchased from NCompassLabs (www.ncompasslabs.com). Demonstration copy available by ftp from ftp://ftp.ncompasslabs.com/sa2901e.exe
The calculator provides two modes of operation. There is a standard calculator keypad, much like that provided as a standard accessory with Windows 95. The keypad buttons provide standard functions found on most scientific calculators.
The second mode uses an expression input box where a user may type expressions in standard ASCII format and then have them evaluated. This mode permits for recall and editing of expressions, along with defining stored constants and expressions to be used in other expressions. Expression function summary and syntax is described on a separate linked page.
Graphing works in conjunction with the expression evaluator. An expression is defined in an expression input text box and then submitted to the graphing engine. The graphed points are returned in a table for browsing. Two separate expressions may be defined simultaneously for graphing. Either may be graphed separately, or the sum or difference may be graphed for easy comparison.
ASCII data files may be loaded and plotted directly. This is convenient for exploring a data set not derived from an expression, such as experimental data, or data exported from a spreadsheet or captured from another source.
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Oregon State University
and the
Science Access Project
Copyright 1999. All Rights Reserved.