On Wed, Apr 30, 2014 at 3:33 PM, Scott Kostyshak <skost...@princeton.edu> wrote:
> Hi Dennis,
>
> On Wed, Apr 30, 2014 at 3:03 PM, Fisher Dennis <fis...@plessthan.com> wrote:
>> R 3.1.0
>> OS X
>>
>> Colleagues,
>>
>> I recently updated to 3.1.0 and I have encountered
>> Warning messages: ... Name partially matched in data frame
>> when I do something like:
>> DATAFRAME$colname
>> where colname is actually something longer than that (but unambiguous).
>>
>> I have much appreciated the partial matching capabilities because it fits
>> with my workflow. I often receive updated data months after the initial
>> code is written. In order to keep track of what I did in the past, I
>> provide lengthy (unambiguous) names for columns, then abbreviate the names
>> as I call them. This behavior has been termed “lazy” in various
>> correspondence on this mailing list but it works for me and probably works
>> for others.
>
> Why not store that information elsewhere? e.g. in an attribute?
>
>> I realize that the new message is only a warning but it is a minor nuisance.
>> Would it be possible to add an
>> option(partialMatch=TRUE) ## default is FALSE
>> or something similar to suppress that behavior? That should keep both camps
>> happy.
>
> There is currently no option to control that behavior and (although I
> do understand your use case) I personally hope one is not implemented.
> The reason is that you might put that option in your .Rprofile and
> when you share your code with me I get errors that columns aren't
> found.
Let me change this to "I would get warnings, which would make me worried."
> You can of course redefine the `$`:
>
>> dataf <- data.frame(longColumn = 5)
>> dataf$long
> [1] 5
> Warning message:
> In `$.data.frame`(dataf, long) : Name partially matched in data frame
>>
>> `$.data.frame` <-
> + function (x, name)
> + {
> + a <- x[[name]]
> + if (!is.null(a))
> + return(a)
> + a <- x[[name, exact = FALSE]]
> + return(a)
> + }
>>
>> dataf$long
> [1] 5
>>
>
> I hope you don't do that though.
>
> Another option is to use the more verbose dataf[["long", exact = FALSE]].
>
> Scott
>
>
> --
> Scott Kostyshak
> Economics PhD Candidate
> Princeton University
Scott
--
Scott Kostyshak
Economics PhD Candidate
Princeton University
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