Dear,
I have a dataset with 4 subjects (see ID in example), and 4 treatment (see
TRT in example) which are tested on 2 locations and in 3 blocs. By using
Lattice dotplot, I made a graph that shows the raw data per location and
per bloc. In that graph, I would like to have a reference line per bloc
that refers to the first treatment (T1). However, I can not find how to do
that.
I can make a dotplot with a reference line which is the average of all
treatments (see 2) in example). Under 3), I used the code "panel.abline
(v=mean(x [y=="E" & TRT =="T1"],na.rm=TRUE),col="green", lty=2)" by which
I hoped to set the reference line at 'T1', but than I get the error that
'object TRT is missing'.
Does anybody know a solution?
Thanks in advance!
regards,
Barbara
EXAMPLE:
--------
library(lattice)
# 1) example dataset
#-----------------
dataset <- expand.grid (LOC=c("LOC1", "LOC2"),
BLOC=c(1,2,3),
ID=c("A", "B", "C", "D",
"E"),
TRT=c("T1", "T2", "T3",
"T4"))
dataset$COL <- ifelse(dataset$TRT == "T1", "green",
ifelse(dataset$TRT == "T2", "blue"
,
ifelse(dataset$TRT
== "T3","orange","red")))
dataset$ID.TRT <- as.factor(paste(dataset$ID,dataset$TRT,sep="."))
dataset$OUT <- sample(50:60, 120, replace=TRUE)
#edit(dataset)
dataset <- dataset[order(dataset$LOC,dataset$BLOC,dataset$ID), ]
# 2) dotplot with reference line that is average of all treatments
#------------------------------------------------------------------
dotplot (ID ~ OUT | as.factor(BLOC) * LOC,
data=dataset,pch=c(19,4,17,15),ylab="",xlab="OUT",
scales=list(alternating=FALSE,cex=0.6),
fill.color = dataset$COL,
panel = function(x, y, fill.color, ..., subscripts) {
fill <- fill.color [subscripts]
panel.dotplot(x, y, col = fill, ...)
panel.abline (v=mean(x [y=="E"],na.rm=TRUE),col=
"green", lty=2)
},
main = "Raw OUT Data",
key = list( space ="bottom",
columns=2,
cex=0.8,
pch=19,
border=TRUE,
text= list(c("T1","T2","T3","T4")),
points = list(col=c("green","blue",
"Orange","Red"),pch=c(19,4,17,15))))
# 3) dotplot with error in reference line because 'TRT is missing'
#----------------------------------------------------------------
dotplot (ID ~ OUT | as.factor(BLOC) * LOC,
data=dataset,pch=c(19,4,17,15),ylab="",xlab="OUT",
scales=list(alternating=FALSE,cex=0.6),
fill.color = dataset$COL,
panel = function(x, y, fill.color,ID.TRT, ..., subscripts)
{
fill <- fill.color [subscripts]
panel.dotplot(x, y, col = fill, ...)
panel.abline (v=mean(x [y=="E" & TRT =="T1"]
,na.rm=TRUE),col="green", lty=2)
},
main = "Raw OUT Data",
key = list( space ="bottom",
columns=2,
cex=0.8,
pch=19,
border=TRUE,
text= list(c("T1","T2","T3","T4")),
points = list(col=c("green","blue",
"Orange","Red"),pch=c(19,4,17,15))))
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