[R] more structure than 'str'?
spencer.graves at pdf.com
Tue Dec 18 02:46:58 CET 2007
Hi, Gabor and Charles:
Thanks very much for two simple alternatives to 'str(obj)':
Gabor Grothendieck wrote:
> On Dec 16, 2007 9:44 PM, Spencer Graves <spencer.graves at pdf.com> wrote:
>> How can I see more of the structure than displayed by 'str'?
>> Consider the following:
>> tstDF <- data.frame(a=1, row.names='b')
>> > str(tstDF)
>> 'data.frame': 1 obs. of 1 variable:
>> $ a: num 1
>> The object 'tstDF' has row.names, but I have to suspect they are
>> there -- AND know a function like 'row.names' or 'dimnames' -- to see
>> I've found 'str' extremely valuable for understanding and
>> explaining to others the internal structure of an R object. In many
>> cases, it has helped me find fairly simple ways to do things with R
>> objects that might have been much more difficult and perhaps infeasible
>> without 'str' -- and without access to the right expert, who may not be
>> available in the time I have to solve a particular problem.
>> Thanks again to Martin Maechler, who wrote 'str', and to everyone
>> else who has replied to questions from me over the years.
>> Best Wishes,
>> Spencer Graves
> Try this:
> structure(list(a = 1), .Names = "a", row.names = "b", class = "data.frame")
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