There is also the relatively new "RSiteSearch" package. It's "RSiteSearch.function" searches only help pages of contributed packages but returns the result in a data.frame (of class "RSiteSearch") sorted to put the most interesting package first with help pages sorted within packages. If this package is installed, "system.file('doc', 'RSiteSearch.pdf', package='RSiteSearch')" will give you the location of a 2-page description of the most important features of this package including examples that work. Since that document was written, we've added "|" and "&" for combining the objects returned by different searches and "packageSum2" to add information from installed packages not available from "RSiteSearch" itself.

For example, I'm giving an invited presentation on "Fitting Nonlinear Differential Equations to Data in R" as part of a "Dynamics Workshop" in Vancouver this June 4-6 (http://stat.sfu.ca/~dac5/workshop09/Welcome.html). To prepare for that, I first did the following:

de <- RSiteSearch.function("differential equation")
des <- RSiteSearch.function("differential equations")
# With "de" and "des", each finds things missed by the other. de. <- de | des # combine into one sumDE <- packageSum2(de.) # add details on installed packages.

This helped me decide which packages I should look at first. Hope this helps. Spencer Graves

cr...@binghamton.edu wrote:
For Google searches, I find that throwing in the term cran on every search 
helps weed out irrelevant pages.

For example, instead of
r residuals

I type

r cran residuals

--Chris Ryan

---- Original message ----
Date: Wed, 20 May 2009 09:43:14 -0400
From: Luc Villandre <villa...@dms.umontreal.ca> Subject: Re: [R] How to google for R stuff? To: Kynn Jones <kyn...@gmail.com>
Cc: r-help@r-project.org


Kynn Jones wrote:
Hi!  I'm new to R programming, though I've been programming in other
languages for years.

One thing I find most frustrating about R is how difficult it is to use
Google (or any other search tool) to look for answers to my R-related
questions.  With languages with even slightly more distinctive names like
Perl, Java, Python, Matlab, OCaml, etc., usually including the name of the
language in the query is enough to ensure that the top hits are relevant.
 But this trick does not work for R, because the letter R appears by itself
in so many pages, that the chaff overwhelms the wheat, so to speak.

So I'm curious to learn what strategies R users have found to get around
this annoyance.

TIA!

KJ

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Hi Kynn,

I've had this problem too in the beginning. Luckily, my personal experience has taught me that almost all relevant R-related information can be found either by searching directly through the archives of the different R-forums or by using the functions "RSiteSearch()" or "help.search()". The reference manuals provided with each package (easily accessible on CRAN) are also invaluable sources of information.

Unfortunately, phrasing queries in a way that will yield relevant results is sometimes hard. Knowledge of the terminology mostly comes
>from experience, so patience is in order.
Of course, as a last recourse, there's always the mailing list.

Bottom line is, I suggest you try to avoid generic search engines and concentrate your efforts on the different R-forums (note that there are also package-specific forums).

I suspect the more experienced R-users might have better strategies to propose though...

Cheers,
--
*Luc Villandré*
/Biostatistician
McGill University Health Center -
Montreal Children's Hospital Research Institute/

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