On Feb 18, 2011, at 9:45 AM, Mike Gibson wrote:
I apologize if you have already seen my question. I am new to the
mailing list and I did not get any responses the first time I posted
my question. However, I am not sure my post went through.
It didn't.
Here is my situation:
I have a spreadsheet with columns of fish species (text) and length
(numbers). In the fish species column I have 5 different fish. I
want R to calculate the mean length and standard error for each
species.
I tried using the stats functin with
stats(fishdata, by=species)
R told me it could not find function stats. Is there a library I
need to install to get stats to work?
"stats" is a rather fundamental package that is loaded by default when
R starts up, while "mean" is a function in the base package.
> ?mean
> help(package=stats)
It's possible that "stats" is also a function in some other package,
but you have not told us why you think so. I can tell you that (at
least) 5 different packages have a "describe" function and the base
package has "summary".
> RSiteSearch("stats")
Unfortunately that is not a productive answer to your questions, since
it provides more than 1500 hits, not too surprising I suppose since
this is a "stats" program.
And .... please pay careful attention to the list sig.
--
David Winsemius, MD
West Hartford, CT
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