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- 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.
-
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- 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
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-
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- 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.
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