[R] Execution of larger blocks of pasted code often fails?

[Enrico Schumann]

On Tue, 28 May 2013, Enrico Schumann <es at enricoschumann.net> writes:

> On Tue, 28 May 2013, Mark Breman <breman.mark at gmail.com> writes:
>
>> Hello List,
>>
>> When i paste a large block of R code from an editor to the R command line
>> the execution of the code will often fail at some point because it is not
>> pasted as it was copied.
>>
>> ===============================================================
>> Example:
>>
>> I copied the following block of code (as part of a larger block):
>>
>> ....
>> s$Price <- quote(prices(St, uc=Adjusted, ent=c(Adjusted[-1], NA),
>> xit=c(Adjusted[-1], NA)))
>> s$PnL <- quote(pnl(Price, St))
>> s$PPnL <- quote(ppnl(Price, St))
>> s$RoR <- quote(ror(Price, St, delta=1/Price))
>> t = na.omit(trades(rownames(s), s$Price, s$St))
>> ....
>>
>> and when i paste this to the R command-line the following happens:
>>
>> ....
>>> s$Price <- quote(prices(St, uc=Adjusted, ent=c(Adjusted[-1], NA),
>> xit=c(Adjusted[-1], NA)))
>>> s$PnL <- quote(pnl(Price,
>> +
>> + s$RoR <- quote(ror(Pr
>> + t = na.omit(trade
>> Error: unexpected symbol in:
>> "s$RoR <- quote(ror(Pr
>> t"
>> ....
>> =================================================================
>>
>> As you can see from the example it looks like the code was not pasted
>> correctly.
>> If i execute the same block of code with the source() command it runs just
>> fine!
>>
>
> [...]
>
> Just for the record, I can copy and paste your code -- and get errors of
> the type
>
>   Error in na.omit(trades(rownames(s), s$Price, s$St)) : 
>   could not find function "trades"

I forgot to mention that this is with R 2.15.3 with x86_64-pc-linux-gnu
(64-bit), and it worked both in Emacs/ESS and when pasting to R running
in a GNOME Terminal.

>
> But as others have already pointed out, it is better to '?source' code,
> or to use an editor that can push code chunks directly to R.


-- 
Enrico Schumann
Lucerne, Switzerland
http://enricoschumann.net