[R] separate commands by semicolon
dusa.adrian at unibuc.ro
Sat Sep 17 17:28:06 CEST 2016
There is one minor problem with parse(): if any of the individual commands
has an error, the entire text will be parsed in a single error.
For example, in a normal R console:
> print(2); ls(
So first print(2) is executed, and only after the console expects the user
to continue the command from ls(
Parsing the same text:
> parse(text = "print(2); ls(")
Error in parse(text = "print(2); ls(") :
<text>:2:0: unexpected end of input
1: print(2); ls(
What I would need is something to separate the two commands, irrespective
of their syntactical correctness:
 "print(2)" "ls("
I hope this explains the situation,
On Thu, Sep 15, 2016 at 11:02 PM, Adrian Dușa <dusa.adrian at unibuc.ro> wrote:
> On Thu, Sep 15, 2016 at 10:28 PM, William Dunlap <wdunlap at tibco.com>
>> The most reliable way to split such lines is with parse(text=x).
>> Regular expressions don't do well with context-free grammars.
> Oh, that's right of course.
> > as.character(parse(text = x))
>  "foo <- \"3;4\"" "bar <- \"don't ; use semicolons\""
> That was simple enough, thanks very much,
> Adrian Dusa
> University of Bucharest
> Romanian Social Data Archive
> Soseaua Panduri nr.90
> 050663 Bucharest sector 5
University of Bucharest
Romanian Social Data Archive
Soseaua Panduri nr.90
050663 Bucharest sector 5
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