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venn.txt
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1997-07-08
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WELCOME TO THE VENN DIAGRAM DEMONSTRATION
Venn Diagrams are used to abstract data in
collections of numbers known as Sets. Real
Sets contain a positive quantity of unique
numbers (with the exception of the Empty Set
which has identically zero entries).
This demo allows you to view sets and set
operations on real integer sets which have
been randomly generated (2 sets are generated
upon demo startup).
MENU OPTIONS
------------
File Menu:
Select "Quit" to close the Venn diagram
demonstration.
Options Menu:
Select a set from the "View Set Data" sub-menu
to view the set's data. You can use this option
to verify the results of the set calculator.
About Menu:
Select "About Venn Demo" to view this help
text.
USING THE SET CALCULATOR
------------------------
The Set Calculator allows you to perform
three classical set operations on two sets
at a time: Intersection, Subtraction, and
Union. Intersection is the collection of
all numbers shared commonly by any two
sets. Union is the combination of all of
the numbers in the two sets with replicate
numbers excluded. Subtraction of one set
from a second set yields the elements of the
second set minus the intersection of the
first and second sets.
Set Buttons (A, B, C, etc.)
These buttons correspond to the currently
available sets. When you perform a set
calculation, a new set containing the
result of the calculation will become
available.
Set Operation Buttons
These buttons are labeled with the standard
symbols for the operations Intersection,
Union and Subtraction. Operations are performed
in the following order:
[Set] [Operation] [Set] [Equals]
Clearing Mistakes or Errors
Click the button with the left-pointing
arrow to remove the most recently entered
set or operator. Click the "CE" button to
clear the entire display.
Set Droplist
You can choose which set to display in the
draw area by selecting an option from the
droplist labeled "Currently Viewing:".