[R] Reading R code help--Beginner

[Erik Iverson]

> Hi, I am brand new to R and not familiar with the language, though I 
> have been reading the manuals and making some slow going progress. I am 
> working with some source code from a Global Vector Auto -Regressive 
> program written by Ranier Puhr from the R-forge group. I need help 
> interpreting the processes of the following code. 

There are several ways of tracing through/debugging R code.  I believe 
there was an R News article a few years ago about the debug package.  I 
find that package useful for stepping through code and inspecting what 
is happening to the objects at each step of the execution.