[R] R data query

[Roger Bivand]

On Thu, 21 Sep 2006, Al-Kharusi, L. wrote:

> Dear Sir/Madam,
> 
> 
> I am encountering one of those alien computer momements one finds every
> so often in life. See the sequence below:
> 
> > fish3.fis <-read.csv("emperor2.csv", check.names = TRUE, strip.white =
> TRUE)
> > colnames(fish3.fis)
>  [1] "Month"           "Year"            "FishingArea"
> "SumOfTotalCatch" "CPUE"           
>  [6] "rCPUE"           "PA"              "Latitude"        "Longitude"
> "Depth"          
> [11] "SST"            
> > hist(CPUE)
> Error in hist(CPUE) : Object "CPUE" not found

hist(fish3.fis$CPUE)

CPUE is inside the data.frame object and so cannot be "seen" in the 
workspace.

Reviewing:

http://cran.r-project.org/doc/manuals/R-intro.html#Data-frames

may help.

> 
> So, the system knows CPUE exists, but will not do a hist or a gam model
> using the term - but for some strange reason it will do a plot. I have
> created a completely different data file and that same problem is
> happening. The imported files are exactly the same as I was using quite
> happily last month. 
> 
> As you will see from the above I've tried adding check.names and
> strip.white in the reading in process to avoid the unseen effect of
> blank spaces.
> 
> Any ideas what I might do next? Have you come across this issue at all? 
> 
> Thanks
> 
> 
> Lubna Al-Kharusi
> PhD student (GIS)
> Department of Geography
> University of Leicester
> University Road
> Leicester
> LE1 7RH
> mobile # 07886990332
> 
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> 

-- 
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand at nhh.no