Arrow () in ggplot2 is no longer supported

Question

R 2.15.2 is installed on the new computer and ggplot2. The grid package is no longer supported in this latest version of R, but ggplot2 uses the grid for the arrow() function, as in these examples.

http://docs.ggplot2.org/current/geom_segment.html

Could not find workaround. Any suggestions?

Answer 1

Perhaps you think grid no longer supported due to the message displayed on the CRAN page ? But if it says that the package grid was removed from the CRAN repository, it is because now it is part of the core R distribution, as indicated on the Paul Murrell grid page .

So library(grid) and arrow function should work fine.

Some confusion may be related to the fact that the grid automatically loaded by previous versions of ggplot (making the grid functions visible / accessible to the user); they are now referred to instead through the NAMESPACE import, so you need to explicitly load the grid if you want to use the grid functions (or see their help pages).