Installing the Matrix Solver

The Matrix Solver is an extension to QuickFigure (a QuickFigure Tool).
To install the Matrix Solver, simply download it to your Newton. It
will not appear in the Extras Drawer, but it may be removed using the
Remove Software button in either the Card dialog (if it is installed on
a memory card) or ÒPrefsÓ/ÓMemoryÓ if it is installed in internal
memory. It will be listed as Òsolver:donvÓ.

The Matrix Solver requires approximately 7k of memory.

To use the Matrix Solver, open QuickFigure, and select the cells
containing the matrix you wish to solve (see ÒUsing the Matrix SolverÓ
below), tap on the ÒToolsÓ button, and select ÒMatrix SolverÓ from the
list of Tools.

The following is an excerpt from the QuickFigure Pro 2.1 UserÕs Guide
(my apologies for the very lame ASCII illustrations):

Using The Matrix Solver

The Matrix Solver is a QuickFigure Tool which allows you to solve
linear equations, I.e. equations where you have x equations and x
unknowns. For example, you might have the following 3 equations and 3
unknowns:

45a+34b+23c=456
34a+98b+76c=78
2a+5b+7c=12

You could then solve for the three unknowns (a,b, and c).

To solve this using the matrix solver, you would enter each coefficient
into a cell, leaving blank cells in between the last coefficient. For
example:

         A	 |		B	|	 C	  |	D	 |	 E
-----------------------
1 		45	|	34	|	23	|	 	  |	456
-----------------------
2 		34	|	98	|	76	|		   |	78
-----------------------
3 		2		|	5		 |	  7	 |		  |	12
-----------------------

Now, select the area (the range A1:E3 in this example), tap on the Tools button, select
ÒMatrix SolverÓ from the pop-up menu which appears, and the solutions
will appear in column D. For example:

	A	       |		B	|	C	   |	 	  D       |	E
---------------------------
1		45	|	34	|	23	|13.066	 |	456
---------------------------
2		34	|	98	|	76	|-4.868	 |	78
---------------------------
3		2	   |	5	  |	7	  |1.4584	 |	12
---------------------------


In this example, the solutions for each variable are: 

a: 13.066
b: -4.868
c: 1.4584

Note: The Matrix Solver is a QuickFigure Tool, so it does not have an
icon in the Extras Drawer. If you wish to remove it from your Newton,
it will appear when you tap the ÒRemove SoftwareÓ button in your Card
or Prefs/Memory dialog. Its symbol is Òsolver:donv.Ó


About the Matrix Solver
=================

The Matrix Solver was written for PelicanWare by Ashish Mishra. 

Copyright 1994, PelicanWare, Inc.