**eulerr** generates area-proportional Euler diagrams that display set
relationships (intersections, unions, and disjoints) with circles or
ellipses. Euler diagrams
are Venn diagrams without the requirement that all set interactions be
present (whether they are empty or not), which means that, depending on
input, **eulerr** sometimes produces Venn diagrams and sometimes not.

With three or more sets intersecting, exact Euler diagrams are often
impossible. For such cases **eulerr** attempts to provide a good
approximation by numerically tuning the parameters of the ellipses or
circles to minimize the error in the resulting diagram. Residuals and
goodness of fit statistics are provided to assess whether the resulting
diagram can be trusted.

```
install.packages("eulerr")
```

```
devtools::install_github("jolars/eulerr")
```

eulerr is also available as a shiny app hosted at eulerr.co.

```
library(eulerr)
# From Wilkinson 2012
fit <- euler(c("A" = 4, "B" = 6, "C" = 3, "D" = 2, "E" = 7, "F" = 3,
"A&B" = 2, "A&F" = 2, "B&C" = 2, "B&D" = 1,
"B&F" = 2, "C&D" = 1, "D&E" = 1, "E&F" = 1,
"A&B&F" = 1, "B&C&D" = 1),
shape = "ellipse")
```

We can inspect the goodness-of-fit metrics *diagError* and *stress* for
the solution,

```
fit$stress
#> [1] 3.930017e-12
fit$diagError
#> [1] 6.07127e-07
```

and plot it

```
plot(fit)
```

Please see the introductory
vignette
for a brief introduction or *eulerr under the
hood*
for details.

eulerr is open source software, licensed under GPL-3.

eulerr uses semantic versioning.

Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms.

eulerr would not be possible without Ben Fredericksonâ€™s work on venn.js or Leland Wilkinsonâ€™s venneuler.

jolars/eulerr documentation built on Aug. 8, 2019, 8:07 p.m.

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