For each level of the factor in dotplot, I have time points I'd like to
connect with a line. In the example below, 'x' represents a starting
time and 'd' a duration, and I wish to connect 'x' to 'x+d'. Ordinarily
I would use Dotplot from hmisc for this, but I have not been able to
find a time class that Dotplot will allow. I can get lattice dotplot to
put the points up, but I've not figured out how to connect them. Any
suggestions?
require(lattice)
z<-data.frame(y=factor(letters),
x=structure(1:26,class=c("POSIXt","POSIXct"),tzone=""),
d=runif(26))
# this puts the points, but does not connect them
p<-dotplot(y~x+I(x+d),
data=z,
scales=list(x=list(format="%M:%S"))
)
zh<-z
zh$x<-as.numeric(zh$x)
require(hmisc)
# this connects them, but at the expense of the time info
ph<-Dotplot(y~Cbind(x,x,x+d),
data=zh,
pch=" ")
Thanks,
Ben
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