Thanks, Duncan, I am confused by the function(x,y, ...) and panel.xyplot(x,y,...). Is
this a must to put in "..."? I knew this may be a stupid question. I am sorry.
Christine
Duncan Mackay <dulca...@bigpond.com> 於 2015年09月14日 (週一) 3:56 PM 寫道﹕
Hi
As Bert has intimated there was a misspelling in panel.abline
To get points as well you need the appropriate arguments for a panel
function otherwise you would only get a line.
You only had a function for a line in panel function so adding panel.xyplot
will give you points as well.
xyplot(DI~Date1|Station, data=Raw,
groups = culr,
par.settings = list(strip.background = list(col = "transparent"),
superpose.symbol = list(cex = rep(2, 2),
col=c("grey","black"),
pch = rep(16,2))),
type="p",
xlab=list("Month",cex=1.5),
ylab=list("Dispersion index",cex=1.5),
index.cond=list(c(1,2,3,4)),
auto.key = T,
layout=c(4,1),
panel = function(x, y, ...){
panel.xyplot(x,y, ...)
panel.abline(h=1,lty=2,lwd=3)
}
)
Regards
Duncan
Duncan Mackay
Department of Agronomy and Soil Science
University of New England
Armidale NSW 2351
Email: home: mac...@northnet.com.au
-----Original Message-----
From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of Christine
Lee via R-help
Sent: Monday, 14 September 2015 13:43
To: r-help@r-project.org
Subject: [R] adding a line across plots in xy plot with panel.abline
Dear all,
I want to draw a line at DI=1 across all four graphs in the xy plot, I have
used panel.abline, but I failed to do so, does any one has an idea of what
has went wrong?
structure(list(Date = structure(c(6L, 7L, 2L, 4L, 13L, 17L, 5L,
12L, 4L, 11L, 14L, 9L, 7L, 2L, 4L, 13L, 10L, 17L, 5L, 12L, 8L,
4L, 11L, 14L, 9L, 16L, 15L, 3L, 10L, 1L, 17L, 5L, 12L, 8L, 4L,
11L, 14L, 12L, 8L, 4L, 11L, 14L), .Label = c("1/10", "1/11",
"11/11", "12/11", "13/10", "19/9", "2/10", "2/11", "20/9", "23/9",
"26/11", "29/10", "29/11", "30/11", "31/10", "4/10", "6/10"), class =
"factor"),
Year = structure(c(1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 2L,
2L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 1L,
1L, 1L, 1L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L,
2L, 2L), .Label = c("Y2002", "Y2014"), class = "factor"),
Station = structure(c(1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L,
3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 4L, 4L,
4L, 4L, 4L), .Label = c("E", "F", "H", "I"), class = "factor"),
DI = c(13.4, 7, 12.6, 12.6, 5.2, 2.2, 1, 1, 1.2, 0.8, 2.3,
3.8, 5.4, 4.6, 5, 3.2, 3.1, 8.7, 2.1, 2.7, 4.9, 4, 2.2, 5.3,
5.6, 4.8, 4, 8.6, 1.9, 2.9, 5.9, 2.6, 8.9, 4, 13.5, 15.3,
12.8, 3.4, 4.7, 1.7, 0.9, 1.7), Date1 = structure(c(16697,
16710, 16740, 16751, 16768, 16714, 16721, 16737, 16751, 16765,
16769, 16698, 16710, 16740, 16751, 16768, 16701, 16714, 16721,
16737, 16741, 16751, 16765, 16769, 16698, 16712, 16739, 16750,
16701, 16709, 16714, 16721, 16737, 16741, 16751, 16765, 16769,
16737, 16741, 16751, 16765, 16769), class = "Date")), .Names = c("Date",
"Year", "Station", "DI", "Date1"), row.names = c(NA, -42L), class =
"data.frame")
Raw$Date1<-as.Date(Raw$Date,"%d/%m")
culr<-ifelse(Raw$Year=="Y2002","Year 2002","Year 2014")
library(lattice)
xyplot(DI~Date1|Station, data=Raw,
groups = culr,
par.settings = list(strip.background = list(col = "transparent"),
superpose.symbol = list(cex = rep(2, 2),
col=c("grey","black"),
pch = rep(16,2))),
type="p",
xlab=list("Month",cex=1.5),
ylab=list("Dispersion index",cex=1.5),
index.cond=list(c(1,2,3,4)),
auto.key = T,
layout=c(4,1),
panel=function(Date1,DI){
panel.labline(h=1,lty=2,lwd=3)
})
Many thanks.
Regards,
Christine
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