Venn Diagrams with Dia ?

2001-01-13 Thread Hilmar Strickfaden


Hello Everybody

I am currently discovering dia (newest linux-release) and I am very
impressed by the possibilities one has with this powerful program.

Due to the fact that I have to create some "Euler-Venn" diagrams (diagrams
to display sets) for a student's script on mathematics I wonder if it is
possible to create them with dia.

I tried to draw a diagram in which two sets intersect themselves. Somehow
it wasn't possible for me  to create an object that represents the
intersection set.

Has anybody an Idea how I can use dia to create these Euler-Venn diagrams 
?

Has anybody experiences in creating that kind of diagrams with dia ?

Best regards,

Hilmar.

-- 



 Hilmar Strickfaden  *  E-Mail: [EMAIL PROTECTED]
   Fakultt fr Biologie  *  Albert-Ludwigs-Universitt
  Sundgauallee 28|01|08  *  D-79110 Freiburg im Breisgau
   Tel. +49 - 761 - 881 - 13 87






Re: Venn Diagrams with Dia ?

2001-01-13 Thread Lars Clausen

On Sat, 13 Jan 2001, Hilmar Strickfaden wrote:

 
 Hello Everybody
 
 I am currently discovering dia (newest linux-release) and I am very
 impressed by the possibilities one has with this powerful program.
 
 Due to the fact that I have to create some "Euler-Venn" diagrams
 (diagrams to display sets) for a student's script on mathematics I wonder
 if it is possible to create them with dia.
 
 I tried to draw a diagram in which two sets intersect themselves. Somehow
 it wasn't possible for me  to create an object that represents the
 intersection set.
 
 Has anybody an Idea how I can use dia to create these Euler-Venn diagrams
 ?

Try using a Beziergon and from the middle mouse menu choose 'Cusp control'
for each endpoint.  Then you can bend the endpoints to look like the
intersection set.  With judicious use of grid you can make various sets
match up.  Unfortunately, beziergons cannot create perfect circles, but you
can approximate it.

Two quick attempts can be seen at
URL:http://shasta.cs.uiuc.edu/~lrclause/EulerVenn.dia

-Lars

-- 
Lars Clausen (http://shasta.cs.uiuc.edu/~lrclause) | Hrdgrim of Numenor
"I do not agree with a word that you say, but I| Retainer of Sir Kegg
will defend to the death your right to say it."|   of Westfield
--Evelyn Beatrice Hall paraphrasing Voltaire   | Chaos Berserker of Khorne




Re: Venn Diagrams with Dia ?

2001-01-13 Thread Harry George

An alternative:

Make the "universe rectangle".

Make two circles, overlapping.  Do dialogs...properties...draw background=no.
You can stop there, label the regions, and be done.  Or...

Make a beziergon, with the control points at the intersecting lines of the two
circles.  Drag as best you can to match the curves.  Change fill color.

   On Sat, 13 Jan 2001, Hilmar Strickfaden wrote:
   

Hello Everybody

I am currently discovering dia (newest linux-release) and I am very
impressed by the possibilities one has with this powerful program.

Due to the fact that I have to create some "Euler-Venn" diagrams
(diagrams to display sets) for a student's script on mathematics I wonder
if it is possible to create them with dia.

I tried to draw a diagram in which two sets intersect themselves. Somehow
it wasn't possible for me  to create an object that represents the
intersection set.

Has anybody an Idea how I can use dia to create these Euler-Venn diagrams
?
   
   Try using a Beziergon and from the middle mouse menu choose 'Cusp control'
   for each endpoint.  Then you can bend the endpoints to look like the
   intersection set.  With judicious use of grid you can make various sets
   match up.  Unfortunately, beziergons cannot create perfect circles, but you
   can approximate it.
   
   Two quick attempts can be seen at
   URL:http://shasta.cs.uiuc.edu/~lrclause/EulerVenn.dia
   
   -Lars
   

-- 
Harry George
[EMAIL PROTECTED]