Re: [R] Newbie question on subsets

From: jim holtman <jholtman_at_gmail.com>
Date: Sat, 19 Jan 2008 22:52:54 -0500

Part of the problem is that 'country' is probably a factor and you will get all the levels that were in the original factor in the new subset. Try the following that will remove the extra levels in the factor:

my.subset <- subset(Forbes2000,

                            country %in% c("United
Kingdom","Germany","India","Turkey"))

# remove the extra factor levels
my.subset$country <- my.subset$country[, drop=TRUE]

boxplot(log(marketvalue)~country,
  data = my.subset,
  ylab="log(marketvalue",
  varwidth=TRUE)

On Jan 19, 2008 10:11 PM, Joe Trubisz <jtrubisz_at_mac.com> wrote:
> Hi...
>
> I'm working through the book, A Handbook of Statistical Analyses
> using R by Everitt, and I'm trying to do the following (p. 19 of his
> book):
>
> boxplot(log(marketvalue)~country,
> data = subset(Forbes2000,
> country %in% c("United
> Kingdom","Germany","India","Turkey")),
> ylab="log(marketvalue",
> varwidth=TRUE)
>
> This *almost* works, but I'm getting ALL the countries on the x-axis,
> not just the 4-specified.
> I tried tinkering with variations in the subset command to no avail.
>
> Can someone tell me what's wrong/missing with the above command?
>
> Thanks,
> Joe
>
> ______________________________________________
> R-help_at_r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem you are trying to solve?

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Received on Sun 20 Jan 2008 - 03:59:43 GMT

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