Time to update R...

When you get one of these:

Warning message:
package ‘dplyr’ was built under R version 3.1.2 


it's probably time to check the version of R, your using and probably time to update it too!

Type
> version

into the Console of R-studio and it will tell you what version you have currently..

I just updated R and got this response:

platform       x86_64-apple-darwin13.4.0   
arch           x86_64                      
os             darwin13.4.0                
system         x86_64, darwin13.4.0        
status                                     
major          3                           
minor          2.2                         
year           2015                        
month          08                          
day            14                          
svn rev        69053                       
language       R                           
version.string R version 3.2.2 (2015-08-14)
nickname       Fire Safety