`plot.euler()`

has been rewritten completely from scratch, now using a custom**grid**-based implementation rather than**lattice**. As a result, all`panel.*()`

functions and`label()`

have been deprecated as well as arguments`fill_alpha`

,`auto.key`

,`fontface`

,`par.settings`

,`default.prepanel`

,`default.scales`

, and`panel`

. The method for plotting diagrams has also changed—rather than overlaying shapes on top of each other, the diagram is now split into separate polygons using the**polyclip**package. Instead of relying on semi-transparent fills, the colors of the fills are now blended in the CIELab color space (#16).- The default color palette has been resdesigned from scratch to suit the new plot method.
- A new function
`eulerr_options()`

have been provided in order to set default grahical parameters for the diagrams.

- Arguments
`counts`

and`outer_strips`

to`plot.euler()`

are now defunct. `euler()`

now always returns ellipse-based parameters with columns`h`

,`k`

,`a`

,`b`

, and`phi`

, regardless of which shape is used. This item was previously named “coefficients”, but it now called “ellipses” instead and a custom`coef.euler()`

method has been added to make cure that`coef()`

still works.- Layouts are now partially normalized so that diagrams will look approximately the same even with different random seeds.

- Providing custom labels to
`quantities`

and`labels`

arguments of`plot.euler()`

now works correctly (#20).

- The last-ditch optimizer switched from
`GenSA::GenSA()`

to`RcppDE::DEoptim()`

. - The optimizer used in all the remaining cases, including all circular diagrams and initial layouts, was switched back to
`stats::nlm()`

again. - In final optimization, we now use
*stress*instead of residual sums of squares as a target for our optimizer.

`label`

is now a proper generic with an appropriate method (`label.euler()`

).- The
**eulerr under the hood**vignette has received a substantial update.

- Fixed warnings resulting from the deprecated
`counts`

argument in one of the vignettes. - Fixed memcheck errors in the final optimizer.
- Corrected erroneous labeling when
`auto.key = TRUE`

and labels were*not*in alphabetic order. (#15)

- Added the missing %\VignetteEngine{knitr::knitr} to both vignettes. It had mistakenly been left out, which had mangled the resulting vignettes.

- Ellipses are now supported by setting the new argument
`shape = "ellipse"`

in`euler()`

. This functionality accompanies an overhaul of the innards of the function. - Initial optimization function and gradient have been ported to C++.
- The initial optimizer has been switched from
`stats::optim(..., method = "L-BFGS-B")`

to`stats::nlminb()`

. - The final optimizer now falls back to
`GenSA::GenSA()`

when the fit from`nlminb()`

isn’t good enough, by default for 3 sets and ellipses, but this behavior can be controlled via a new argument`control`

. - A packing algorithm has been introduced to arrange disjoint clusters of ellipses/circles.
- The label placement algorithm has been rewritten to handle ellipses and been ported to C++. It now uses numerical optimization, which should provide slightly more accurate locations.
- The initial optimizer now uses an analytical Hessian in addition to gradient.

- The initial optimizer now restarts up to 10 times and picks the best fit (unless it is perfect somewhere along the way).
- The default palette has been changed to a fixed palette, still adapted to color deficiency, but with some manual adjustments to, among other things, avoid unnecessary use of color.
- The names of the
`diagError`

and`regionError`

metrics have been changed from`diag_error`

and`region_error`

to reflect the original names. - The coordinates for the centers are now called
*h*and*k*instead of*x*and*y*, respectively. - A new
`label()`

function has been added to extract locations for the overlaps for third party plotting (#10). - The
`counts`

argument to`plot.euler()`

and`panel.euler.labels()`

have been deprecated in favor of the more appropriate`quantities`

. - Argument
`fill_opacity`

in`plot.euler()`

that was deprecated in v2.0.0 has been made defunct.

`eulerr()`

has been replaced with`euler()`

(see update 1.1.0) and made defunct.- There are two new methods for
`euler`

:`euler.list()`

produces diagrams from a list of sample spaces.`euler.table()`

produces diagrams from a`table`

object, as long as there are no dimensions with values greater than 2.

`plot.euler()`

has been rewritten (again) from the ground up to better match other high-level functions from**lattice**. This change is intended to be as smooth as possible and should not make much of a difference to*most*users.- Arguments
`polygon_args`

,`mar`

, and`text_args`

to`plot.euler()`

have been made defunct.

`plot.euler()`

handles conflicting arguments better.- c++ routines in
`eulerr`

now use registration. `euler()`

now allows single sets (#9).- Labels in
`plot.euler()`

now use a bold fontface by default in order to distinguish them from the typeface used for counts. - Argument
`key`

in`plot.euler()`

has been deprecated and replaced with`auto.key`

. Notice that using`key`

does not throw a warning since the argument is used in`lattice::xyplot()`

(which`plot.euler()`

relies on). - Argument
`fill_opacity`

is softly deprecated and has been replaced with`fill_alpha`

for consistency with other lattice functions.

`border`

argument in`plot.euler()`

works again (#7).

`eulerr()`

and its related methods been deprecated and are being replaced by`euler()`

, which takes slightly different input. Notably, the default is now to provide input in the form of disjoint class combinations, rather than unions. This is partly to make the function a drop-in replacement for`venneuler::venneuler`

.`plot.euler()`

has been completely revamped, now interfacing`xyplot()`

from lattice. As a result, arguments`polygon_args`

,`mar`

, and`text_args`

have been deprecated.

- Added a
`counts`

argument to`plot.eulerr`

, which intersections and complements with counts from the original set specificiation (#6). - Added a
`key`

argument to`plot.eulerr`

that prints a legend next to the diagram. - Switched to
`atan2()`

from RcppArmadillo. - Added version requirement for RcppArmadillo.
- Dropped dependency on MASS for computing label placement, replacing it with a faster, geometric algorithm.
- Dropped the cost function argument
`cost`

and now forces the function to use sums of squares, which is more or less equivalent to the cost function from`venneuler`

. - Color palettes in
`plot.euler()`

now chooses colors adapted to color vision deficiency (deuteranopia). With increasingly large numbers of sets, this adaptation is relaxed to make sure that colors are kept visually distinct. `euler()`

now uses`nlm()`

instead of`optim(method = "Nelder-Mead")`

for its final optimization.

- The previous algorithm incorrectly computed loss from unions of sets. It now computes loss from disjoint class combinations.
- Added missing row breaks in
`print.eulerr`

.

- Final optimization routines have been completely rewritten in C++ using Rcpp and RcppArmadillo.
- Switched to the cost function from EulerAPE for the default optimization target but added the posibility to choose cost function via a
`cost`

argument (currently`eulerAPE`

or`venneuler`

). - Added the option to produce conditional eulerr plots via a
`by`

argument to`eulerr`

. The result is a list of euler diagrams that can be plotted in a grid arrangement via a new plot method. - Improved label placement by using a two-dimensional kernel density estimation instead of means to calculate label centers.

- Cleaned up typos and grammar errors in the
*Introduction to eulerr*vignette. - Added
`mar`

argument to`plot.eulerr`

with a default that produces symmetric margins. - Corrected the implementation of the
`stress`

statistic from venneuler. - Switched to Vogel sampling to generate points to choose label positions from.
- Minor clean up and performance fixes all around.
- Added a
`print.eulerr`

method. - Updated vignette to cover new features and changes.

- The first release.