Hi,
Given a certain data.frame, the lattice xyplot function will plot the
data as.is and join the data point in the order of the data frame. It is
my (probably flawed) understanding that, using the same data frame,
ggplot orders the data by increasing order of the x-axis variable. Can
one control this behavior?
Thanks
Sebastien
Code example
library(lattice)
library(ggplot2)
data <- data.frame(x=rep(1:4,each=25),
y=rep(1:25,times=4),
g=rep(1:4,each=25))
data$x <- data$x + 0.005*(data$y)^2-0.1*data$y+1
col <- 3:7
xyplot(y~x,data=data,groups=g,type='l',col=col)
ggplot(data, aes(x,y,group=g)) + geom_point(colour=col[data$g]) +
geom_line(colour=col[data$g])
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