[R] How to execute an expression as well as a .R file with Rscript?

[thmsfuller066 at gmail.com]

Hello All,

I'm trying to supply both an expression and a .R file to Rscript. But
it seems that it is not possible with the first approach (see below)
and I'll have to use the second approach (see below). I'm wondering if
it is a bug in Rscript not to support both a .R file and an
expression.

$ cat main.R
x=x+3
print(x)
$ cat main.sh
#!/usr/bin/env bash

Rscript -e 'x=10' main.R #first approach
Rscript -e "x=10; source('main.R')" #second approach
$ ./main.sh
> x=10
>
>
> x=10; source('main.R')
[1] 13
>
>


-- 
Tom