Hello
I have been experimenting with xyplot, reading the help and googling but
I am still unable to draw an abbreviated key.
I would like to display key for a few particular countries.
My dataset looks like this
year papers country papers.total
1 1988 403 USA 551
2 1988 31 United Kingdom 551
3 1988 24 Canada 551
4 1988 20 Netherlands 551
5 1988 19 Israel 551
6 1988 16 Germany 551
7 1988 13 France 551
8 1988 10 Italy 551
9 1988 8 Switzerland 551
10 1988 5 Japan 551
11 1988 5 Denmark 551
12 1988 3 Spain 551
13 1988 3 Russia 551
14 1988 2 Sweden 551
15 1988 2 Poland 551
16 1988 2 Finland 551
17 1988 2 Brasil 551
18 1988 2 Australia 551
19 1988 1 Thailand 551
20 1988 1 Norway 551
21 1988 1 Mexico 551
22 1988 1 Ireland 551
23 1988 1 Greece 551
24 1989 649 USA 926
25 1989 53 United Kingdom 926
26 1989 43 France 926
27 1989 37 Canada 926
28 1989 36 Germany 926
29 1989 28 Netherlands 926
30 1989 19 Sweden 926
[...]
I use xyplot to show how many papers
> xyplot(papers~year,groups=country,type='l',auto.key=T)
produces an extremely long key
> xyplot(papers~year,groups=country,type='l',key=simpleKey(levels(as.factor(country))[1:5]))
shows *alphabetically* first five countries in the key
> xyplot(papers~year,groups=country,type='l',key=simpleKey(c('USA','Germany')))
displays correct countries but the colors obviously do not match.
Could you please point me in the right direction?
Vaclav
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