I finally had time to put together a minimal example:
> d <- data.table(a=1:2, b=1:2)
> d[round(a) == a]
a b
1: 1 1
2: 2 2
> d[a == round(a)]
Error in eval(expr, envir, enclos) : object 'a' not found
Is this a bug, or am I missing something about the scoping rules?
R 3.1.2, data.table 1.9.4, on Windows 7.
Thanks,
Johann
On Fri, Dec 12, 2014 at 10:18 AM, Johann Hibschman <[email protected]> wrote:
> I just ran into an issue where d[X==round(X)] gives different results
> from d[round(X) == X]. Why would that happen?
>
> Here's the exact example:
>
>> z.dev[YIELD == round(YIELD),]
> Error in eval(expr, envir, enclos) : object 'YIELD' not found
>> z.dev[round(YIELD) == YIELD,]
> runId dealName cusip scenarioId shockId pathOrder PRICE100
> YIELD MOD_DURN MOD_CONVEXITY DISC_MARGIN SPREAD_BP
> 1: 10556 HVML0501 41161PLE1 772 0 3 54.5094
> 6 4.739 0.431 400 418
> 2: 10556 HVML0501 41161PLE1 773 0 3 52.9452
> 6 4.706 0.427 400 424
>
> Thanks,
> Johann
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