String together combinations by joining them with an ampersand (&).

*To cite eulerr in publications, please use:*

*A BibTeX entry for LaTeX users is*

This
shiny
app is based on an
R
package that I have developed called eulerr. It generates
area-proportional euler diagrams using some rather groovy algorithms
and optimization routines written in
`R`

and
`C++.`

euler diagrams
are generalized venn diagrams for which the requirement that all
intersections be present is relaxed. They are constructed from
a specification of set relationships but may sometimes fail
to display these appropriately. For instance, try giving the
app the specification
`A = 5, B = 3, C = 1, A&B = 2,AB&C = 2`

to see what I mean.

When this happens, eulerr tries to give an indication of how
badly the diagram fits the data through the metrics
*stress*
and
*diag error*
. The latter of these
show the largest difference in percentage points between the specification
of any one set combination and its resulting fit. It is the
maximum value of
*region error*
, which is given for
each combination. This metric has been adopted from
a paper by
Micallef and Peter Rodgers.
Stress is more difficult to
explain, but I advise the interested reader to read
Leland Wilkinson's excellent paper
for a proper brief.

I have listed some links on the right if you are keen on learning more about eulerr, perhaps even to contribute to its development. Finally, I owe a great deal to the aforementioned Wilkinson as well as Ben Frederickson whose work eulerr is built upon.

Johan Larsson

Updated eulerr to version 4.0.0

Migrated to http://eulerr.co

Added option to set pointsize (mostly for fonts).

Added settings for height and width when downloading plots.

Added the option to supply a seed to enable reproducible layouts