


1 Running MathGraf
------------------

MathGraf can be started by clicking the left
mouse button on the mathgraf.exe file from the
File Manager. It can also be started by clicking
the MathGraf icon in the program manager if you
added MathGraf to one of your application groups.
A third way to start MathGraf is by clicking on
a *.mgf file from the File Manager if you
associated the  *.mgf files to mathgraf.exe from
the File Menu of Program Manager.


2 Save, Save as, Open files
---------------------------

These functions will save or load a graphics 
definition file containing up to ten distinct
curves. 



3 About box
-----------

If you have a licensed copy and have entered
your licence key, this will display the owner
of this copy and the number of users covered
by the licence. Otherwise the licensing 
information will be displayed. 



4 Copy graphics to the clipboard
--------------------------------

The copy option copies the current graphic
window to the clipboard. The contents of the
clipboard can then be pasted in other Windows
graphics programs.


5 Origin Option
---------------

This function will redraw the current graphic
without changing the interval size but centered
at the origin.             


6 Show Coordinates
------------------

The current x,y coordinates of the mouse pointer
are displayed on the screen with the coordinates
option.


7 Wider Interval
----------------

The wider option will enlarge the x and y
range by a factor of two


8 Zoom and Moving Around
------------------------

The zoom option permits to restrict the graphic
interval. Press the left mouse button and drag
the mouse while holding the button. You can
move around the graph by clicking the scroll bars
with the mouse or by using the arrow, page up and
page down keys.


9 Define up to 10 Math Functions
--------------------------------

The function must be in terms of x 
only:  f(x).

It can contain:

- The variable x
- Any real or integer constant
- p (for PI)
- e (for 2.7182818)
- Any function abreviation listed in 
  the function dialogue box

The function must be entered in POSTFIX  
notation. i.e.: you can view the 
function as being evaluated from left to
right. And each time a number or a 
variable is read, it is placed on top of a 
stack. And each time an operator is read
it is applied to the last two or one 
numbers placed on the stack. Then the 
result of the operation is placed on top
of the stack. This method is identical
to the one used some scientific
calculators. There must be at least one
space character between each element of
the function. An error message is displayed
when there is a syntax error detected in
one of the functions.

examples:

__________________________________
    infix        |    postfix
_________________|________________
 (3x + 2)        |    3 x * 2 +
_________________|________________
 x raised        |
 to the power    |
 of 3            |     x 3 ^
_________________|________________
 sin(x+2)        |     x 2 + s
_________________|________________
 abs(cos(3*x))   |     x 3 * c a
_________________|________________
 -x              |     x -1 *
_________________|________________
 x modulo 5      |     x 5 m
_________________|________________

Note: To obtain -x, multiply x by -1


10 Graphic Interval
-------------------

xa,xb,ya,yb can be any real number where
xa < xb and ya < yb

The numbers can be in decimal or exponential
notation.

examples of valid numbers: 2
                           34.99875
                           2.1E-10


11 Redraw
---------

Redraw the graphic screen


12 Options
----------

Gives you the possibility to select one of nine
combinations of pen width and resolution. 
Select a large pen on very high resolution 
screens. Graphics will be displayed much faster
if you select a small pen and low resolution.

Available widths:

Small   1 pixel
Medium  2 pixel
Large   3 pixel



13 Printing
-----------

A graphic can be printed by copying it to
the clipboard with the copy option in the
menu and then pasting it in a graphics
package such as Micrografix Designer or
Windows Paint. From there, the graphic can
be sent to the printer.

  a: Draw your graph
  b: Select the copy option in Mathgraf
  c: Open your graphics package
     (for example Paint)
  d: Select the paste option in the edit
     menu of Paint.
  e: Modify the drawing or print it as it
     is.




