Locus32 version 1.50 ReadMe

N.B. This is a Shareware application and is not free.
Please see the Licence.txt and Register.txt files
which are included with this distribution.

Locus32 is a mathematical graph plotter and data analysis
tool written to provide ease of use with sophistication.
It is sophisticated enough for use with post 16 and
post 18 students and straightforward enough to
be used at a much earlier stage and educational
development.

It has the following features:

   1.    Formula based graph plotting in five operational
          modes:
               *  Cartesian  (non-parametric)
               *  Polar (non-parametric)
               *  Cartesian  (parametric)
               *  Polar  (parametric)
               *  Implicit  (non-parametric)


   2.	Inequalities can be plotted in Cartesian and Implicit modes.
   3.	The user can watch the graph being plotted.
   	This is very useful and educationally important.
  	It is also rare among desktop graph plotters.
   4.	Formulae can be entered in standard algebraic
   	notation.
   5.	Formulae can have aliases defined for them.
   6.	Functions can be input in user defined function
   	notation.
   7.	Constants can be used.
   8.	Families of graphs can be plotted.
   9.	Commonly used functions in each of the five modes
   	can be saved and edited.
   10.	You can choose fully automatic axis scaling or
   	have complete manual control.
   11.	It features a drag box zoom and an automated zoom
   	out facility.
   12.	The graph can be moved up, down,  right and left
   	as required.
   13.	It can analyse gradients of functions and areas
   	under graphs and draw gradient and integral
   	functions.
   14.	Bi-variate data sets in Text, TSV, CSV or SID formats
   	can be imported.
   15.	User defined transformations of datasets using
   	matrices or descriptions can be applied.
   16.	Statistical information including means, standard
   	deviations and least squares regression lines can
   	be calculated.
   17.	Data can be saved in Bitmap, Gif, Text, CSV, TSV, SID
   	or its own LocFile format.
   18.	The user can print from the application.
   19.	The toolbar and menu hotkeys are fully configurable.
   20.	All user definable features can be saved as defaults.

Locus32 has been tested by the author on a 486DX4, a 486SX25,
a Cyrix® 200, an AMD K6 2 300Mhz, a 233 Mhz Pentium MMX and a
Pentium® II.

This version needs Windows® 95, 98 or NT to run and is fully
network compatible.  Please let me know of any problems you
have with your configuration.

There are versions of Locus written for Windows® 3.x and
Acorn® RISCOS® machines.

Please see my Web site for more information
http://www.camberwell5.demon.co.uk/

The latest version of Locus32 can always be downloaded from
http://www.camberwell5.demon.co.uk/archives/locus32.zip

Any comments etc. to me please at
locus@camberwell5.demon.co.uk

To INSTALL Locus32 just double click on the Setup.exe file
and follow the on screen instructions.

R.S.  16/02/99

The following Additions and bug fixes have been made in this version. (1.50)

ADDITIONS & BUG FIXES
1. 	Each dataset can have it's own mark, connect and outline settings .
2. 	Locusfiles have been changed to accommodate more features.  Older 
	locusfiles will not work with this version.
3. 	Expressions now work in the transformation dialog box. (eg. p/8 is
 	accepted as an angle where p is Pi.)
4. 	A checkbox has been added to the transformations and matrices dialogs to
 	allow repeated plotting of transformed datasets.
5. 	Auto-scaling Limits for Cartesian and Implicit modes have been added.
6. 	Asymptotes accuracy improved, particularly in functions like y=sec²x and
 	also functions with empty spaces like x²+y²=1
7. 	Trace and tangent functions now work in Implicit mode.  They will not
 	work when the function contains more than one instance of the dependent
 	variable (y) because of the rather complex way that these are plotted. 
8. 	Two calculators, a simple four function one and a scientific one have
 	been added.  Also I have added a Quadratic Solver and	Simultaneous
 	Equations solver.  These features are available from a new menu section
 	called 'Calculators'.
9. 	Inequalities will now save to locfiles and their integrity is preserved
 	when the graph is moved or zoomed.
10.	There is now a checkbox in the Environment dialog box to allow the user
 	to make the 'Move graph' function work in the direction of the mouse
 	movement rather than the box defining the place where you want the graph
 	to redraw (as at present).
11.	There is now a checkbox in the Environment dialog box to allow the user
 	to choose whether the shading for inequalities is on the defined or
 	undefined side.
12. 	Bug when started up in Implicit mode has been fixed.
13. 	Bug in the transition to auto-scaling off mode is now fixed.  The second
 	graph plotted will plot as graph number two and not as graph number one.
14.	Bug fixed where Locus goes into an infinite loop if the user attempts to
 	zoom into an empty space.
15.	Help file has been updated extensively to reflect all of the recent
 	changes.
