r plot, phangorn package

In R in Ubuntu 12.04,

when you install and use the "phangorn" package, you might get such error:

install.packages("phangorn")
library(phangorn)

configure: error: missing required header GL/gl.h
ERROR: configuration failed for package ‘rgl’

normally means you haven't installed the -dev version of a package, in this case GL, and you will need to install: 

sudo apt-get install mesa-common-dev
sudo apt-get install libglu1-mesa-dev 
sudo apt-get install freeglut3-dev 
sudo apt-get install mesa-common-dev

You might get the following error later (in R) because of a tcl b**/gripe/compliant: Error in structure(.External(.C_dotTcl, ...), class = "tclObj") : [tcl] can't find package BWidget.

To fix this problem, if you have it:

install at the regular terminal:

sudo apt-get install bwidget