ggtern 3.1.0 not compatible with ggplot2 3.3.0

[Evonne Cho]

https://cran.r-project.org/web/checks/check_results_ggtern.html

errors can be seen at the above web address

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the most recent version of ggplot2 3.3.0 was pushed on Mar 5, 2020

https://cran.r-project.org/web/packages/ggplot2/index.html

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on ggtern.com: a user named Martin reports installing ggplot2 3.2.1 is necessary for ggtern to work on Mar 22, 2020.

Martin 22/03/2020 | 12:44
Hi!

I came across your post, as I had the same issue.

apparently, there is a problem with the new ggplot2 version (3.3.0) where ggtern does no longer work.

you need to install an older version of ggplot2 (3.2.1), afterwards it works again.

The error when pulling from MRAN:

* installing *source* package ‘ggtern’ ...
** package ‘ggtern’ successfully unpacked and MD5 sums checked
** using staged installation
** R
** data
** demo
** inst
** byte-compile and prepare package for lazy loading
Error in get(x, envir = ns, inherits = FALSE) : 
  object 'expand_default' not found
Error: unable to load R code in package ‘ggtern’
Execution halted
ERROR: lazy loading failed for package ‘ggtern’
* removing ‘/root/lib/.../3.6.2/ggtern’

The downloaded source packages are in
    ‘/tmp/.../downloaded_packages’
Warning message:
In install.packages(pkgs) : installation of one or more packages failed,
  probably ‘ggtern’

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