[R] beginner data.frame question
dwinsemius at comcast.net
Wed Dec 24 00:44:57 CET 2008
If you try these functions on your test.data I am guessing that the
results will differ from above.
On Dec 23, 2008, at 6:29 PM, Kirk Wythers wrote:
> I need some help understanding how on of the example data sets is
> formatted in the basic R installation. If I load the Mona Loa CO2
> data, with the command:
> > data(co2)
> I can view the data with:
> > co2
> And the data are in the form of 11 rows labeled as years (1994-2004)
> and 12 columns labeled (Jan - Dec). This structure appears to be a
> dataframe, however, if I type the command
> > plot(co2)
> I get a time series with CO2 on the x axis and time on the y. Also,
> > summary(co2) gives a single Min, Median, Max.
> The reason for my confusion is that I created another "similar
> looking" data set with read.table. In that case, the data looks to
> be in same format (rows as years, and columns as months). However,
> the command
> > summary(test.data)
> gives a summary for each month. Completely different behavior.
> If use the data.frame command:
> > data.frame(co2)
> I get a single column of CO2 data, while the data.frame command on
> my test.data data, keeps it's year-row, column-month format.
> Can anyone help me understand the differences in how these data sets
> are formatted?
> Thanks in advance.
> R-help at r-project.org mailing list
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
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