Venn Diagram and Shading Overlapping Areas

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Venn Diagram and Shading Overlapping Areas

(5 posts)

Pynes
Member

I have been trying to draw Venn Diagrams, and I can get circles and text in the diagrams just fine. I have even worked on tinkering with setting the length as something other than the standard 1 pt for bigger diagrams and circles. But, I don't know how to make the relevant areas become shaded? I also want to rotate the 'times x' on one of my lines, but that's a lesser issue.

Here is one simple example I have made:

\begin{picture}(0,0.0)

\put(0,0){\circle{40}}

\put(25,0){\circle{40}}

\put(25,0){$\times$}

\put(12.5,-25){\circle{40}}

\put(-3,-12.){$\times$}

\put(100,0){\circle{40}}

\put(125,0){\circle{40}}

\end{picture}

Suggestions on shading or the project in general?

Posted 1 year ago #
Kevin Klement
Key Master

This isn't easy to do. I'll play around with this problem when I have some free time, but in the meantime, my suggestion would be to forgo the picture environment and use a more complicated graphics package like pstricks, pgf/tikz. Or use metapost, which has a venn package.

Some examples of Venn diagrams in PGF/TikZ can be found here.

The PS Tricks also has some examples in the section on clipping.

Posted 1 year ago #
Seamus Bradley
Member

I think this would be easy enough with TikZ if you were familiar with TikZ: it has quite a steep learning curve.

The texample link Kevin posted shows you how it could be done.

Posted 1 year ago #
Aldo Antonelli
Member

If this is not something you need to do all the time, you might want to consider creating the diagrams with some scalable vector graphics program (e.g., Inkscape), and import the ps/pdf file. TikZ and pgf have a pretty steep learning curve.

Posted 1 year ago #
Kevin Klement
Key Master

A bit late, but this post on the TeX StackExchange site looks enormously helpful if you want to do Venn diagrams in LaTeX.

Posted 1 year ago #