[Rd] R-intro

[Uwe Ligges]

Gorjanc Gregor wrote:
> The problem is that there is no file morley.tab. I belive that for first impression or example session, things should work.

Have you read from the beginning in Appendix A? It says:

"Login, start your windowing system. You should also have the file
‘morley.tab’ in your working directory. If not, seek the local expert
(or get it yourself from the ‘datasets/data’ subdirectory of the default
R library tree). If you have, proceed."

The point is that we cannot get the file anymore from "datasets/data", 
because since the days of R-2.0.0 we have the data in package "datasets" 
lazy loaded and the file "morley.tab" is not available in binary 
installations. Hence it is a bug.

Possible solution:
We could copy the file to something like 
.../src/library/datasets/inst/intro/morley.tab

It would also make sense to simplify the Appendix A stuff in R-intro, 
because this is (well, has been) a more or less frequently asked 
question (I wonder why nobody has asked during the last 3 months ....):


filename <- file.path(.find.package("datasets"), "intro", "morley.tab"))
filename
file.show(filename)
mm <- read.table(filename)

Uwe Ligges


> 
>>file.show("morley.tab")
>>mm <- read.table("morley.tab")
> 
> 
> -----Original Message-----
> From: Kjetil Brinchmann Halvorsen [mailto:kjetil at acelerate.com]
> Sent: Fri 2004-12-31 22:01
> To: Gorjanc Gregor
> Cc: r-devel at stat.math.ethz.ch
> Subject: Re: [Rd] R-intro
>  
> Gorjanc Gregor wrote:
> 
> 
>>Hello!
>>
>>I was reading R-intro and I have some suggestions:
>>
>>R-intro.html#A-sample-session
>>
>>rm(fm, fm1, lrf, x, dummy)
>>suggestion
>>rm(fm, fm1, lrf, x, y, w, dummy)
>>
>>The next section will look at data from the classical experiment of Michaelson and Morley to measure the speed of light.
>>
>>file.show("morley.tab")
>>mm <- read.table("morley.tab")
>>suggestion
>>mm <- data(morley)
>> 
>>
> 
> No. Although this looks easier, the whole point is to show people how to 
> use read.table!
> 
> Kjetil
> 
> 
>>rm(fm, fm0)
>>suggestion
>>rm(fm, fm0, mm)
>>
>>objects(); rm(x, y, f, fa)
>>suggestion
>>objects(); rm(x, y, f, fa, oldpar)
>>
>>It might also be usefull to use # for comments, since it is easier to
>>copy&paste to R terminal from manual.
>>
>>--
>>Lep pozdrav / With regards,
>>   Gregor GORJANC
>>
>>---------------------------------------------------------------
>>University of Ljubljana
>>Biotechnical Faculty       URI: http://www.bfro.uni-lj.si
>>Zootechnical Department    email: gregor.gorjanc <at> bfro.uni-lj.si
>>Groblje 3                  tel: +386 (0)1 72 17 861
>>SI-1230 Domzale            fax: +386 (0)1 72 17 888
>>Slovenia
>>
>>______________________________________________
>>R-devel at stat.math.ethz.ch mailing list
>>https://stat.ethz.ch/mailman/listinfo/r-devel
>>
>>
>>
>> 
>>
> 
> 
>