Question

The Script

#!/usr/local/bin/Rscript --slave
args <- commandArgs(TRUE)
print(args); 

The Shell Command

~/Rscript my_script.R hello 10 3

The Output

[1] "hello" "0"     "10"

I was expecting an array like:

[1] "hello"
[2] "0"
[3] "10"

So what am I doing wrong?

Answer 1

That’s just how a vector is printed in R, the same as if you’d created it like this:

> c("hello", "10", "3")
[1] "hello" "10"    "3"    

Try

print(args[1])
print(args[2])
print(args[3])

and you’ll see that each accesses the appropriate string.