[R] Lattice xyplot with text under x-axis

[kate.m]

A million thanks Deepayan! That works great. 


Deepayan Sarkar wrote:
> 
> On Wed, Apr 15, 2009 at 8:59 AM, kate.m <katherine797 at gmail.com> wrote:
>>
>> Hi All,
>>
>> I have a data set which I need to plot and show the values of one of the
>> variables as a second x-axis.
>>
>> library(lattice)
>> year<-c(2001,2002,2003,2004,2005,2006)
>> fac<-c("arts","arts","arts","sci","sci","sci")
>> staff<-c(95,98,99,32,31,36)
>> part<-c(32,31,33,15,16,14)
>> df1<-data.frame(year,fac,staff,part)
>>
>> xyplot(part~year, type="o", xlab="", ylab="")
>>
>> n.val.text<-paste("n = ", df1$staff, sep = "")
>> mtext(n.val.text, side = 1, line = 3, at = axTicks(1), cex = 0.9)
>>
>> This works OK.
> 
> Not really...
> 
>> The problem comes in when I plot the data in panels.
>>
>> xyplot(part~year | fac, as.table=TRUE, type="o", between=list(x=1,y=1),
>> xlab="", ylab="",
>> scales=list(x=list(alternating=3),y=list(alternating=3),
>> relation="free"))
>>
>> The mtext code doesn't work anymore. I think it needs some sort of panel
>> function (panel.groups?) which would tell it to show the appropriate
>> values
>> of "staff" under their respective "year" for each "fac" and each panel.
> 
> Something like
> 
> xyplot(part~year | fac, as.table=TRUE, type="o", between=list(x=1,y=1),
>        scales = list(relation = "free", x = list(at = year, labels =
> paste(year, n.val.text, sep = "\n"))))
> 
> -Deepayan
> 
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