The ideas behind this applet are outlined in a paper submitted to Diagrams 2010.
The applet draws Venn Diagrams with 3 curves. It makes each of the regions proportional to the population (value) assigned to it.
To draw a diagram with your own data, simply type in the data for the zones in the 'population' column, and click the 'Draw Diagram' button, you should map the 3 set names of your data to A, B and C. The population values can be any you like, the program will scale them. The 'Measured Area' column gives a confirmation that the regions are the correct area (or, if they do not match, a indication that they are wrong).
By default the label in each zone is the population. You can create an unlabelled diagram by choosing the 'No Labels' option. The display of the curves and shading can be altered by the 'Colour', 'Shading' and 'Dashed' options.
The diagram types are explained in a paper submitted to the
Diagrams 2010 At the moment the only way to use this diagram is to take a screen shot
('Print Screen' key in Windows) and paste the bitmap into a document. The Euler Diagrams Visualization
project has developed further tools of this sort. The use of the results of this applet is free for research and non profit
use. Ideas used to generate this work were developed by Related Work
Peter Rodgers, University of Kent, UK; Jean Flower, Autodesk; Gem Stapleton and John Howse, University of Brighton, UK
Contact: Peter Rodgers, University of Kent, UK (email)