Parametric Graphing Calculator

These are the files you need. You can send them from the package contents below.

• POLAR.EXE → A:\SOFT programa de DOS 177.9 KB
• PARAM.EXE → A:\SOFT programa de DOS 175.6 KB
• POLPM.EXE → A:\SOFT programa de DOS 176.7 KB

No need to put POLAR.TXT, POLAR.ICO, PARAM.TXT, PARAM.ICO, POLPM.ICO: they are manuals, source code or supporting material. Read them here and save 116.1 KB on a 1 MB disk.

1. Copy POLAR.EXE, PARAM.EXE, POLPM.EXE to A:\SOFT. They are DOS programs: run them from the DOS icon, or add A:\SOFT to the PATH in C:\AUTOEXEC.BAT to call them by name.

Derived from the package contents and the 200LX conventions. It installs to A: on purpose: C: is a RAM disk and every byte there is memory taken from the system.

GETTING STARTED

To begin running the POLAR program type the command:

                          <P> <O> <L> <A> <R> <ENTER>



A FIRST EXAMPLE

You can't perform any really useful operations (except reading the Main Menu
help screens) without first keying in a function.  So perform the first menu
item by pressing

to key in a new function.  An edit box will appear on the screen into which
you are to type your mathematical formula.  The first example function we will
enter is the cardioid  R = 3*(1+cos(@)).  In this tutorial file we will use
the letter @ to denote an angle.  This is the ASCII symbol that comes closest
to matching the Greek letter theta or phi.  On most keyboards this angle
letter is entered using <SHIFT>+<2>.

The asterisk character * is used to to indicate multiplication.  Note that
you do not type in the R = part of the formula since this program knows R is
a function of @.  Type


After pressing ENTER a brief message should appear indicating your function
formula has been accepted and the new formula should now appear at the top of
the Main Menu display screen.


                                "R = 3*(1+COS(@))"


We will now go the Graph Menu by pressing key


You should see a new menu labeled as the "Graph Menu".  Press key


a second time and you should see the graph of a cardioid that corresponds to
the above formula.

It is normal for the program to sound a short beep to indicate it is finished
making a graph.  After admiring the graph press either

                                <ESC> or <ENTER>

and you should return back to the Graph Menu.  Entering and graphing most
polar functions is about as simple as this first example.



CHANGING THE POLAR GRID COORDINATE BACKGROUND

…

Literal excerpt from POLAR.TXT, exactly as it came in the package.