overlap different line in a xyplot (lattice)
On 2010-12-11 03:12, Francesco Nutini wrote:
mmmh, yes this method works... but I have to overlap this two graphs:
xyplot(a ~b |sites, data=dataset, col="red")
xyplot(c ~b |sites, data=dataset, col="blue")
a, b and c are columns in the same dataset. "Sites" is also a column in the dataset, but it's a factorial variables. How can I use your method?
The idea is the same: you need to get your data
into "long" format with a grouping variable and
then use the 'groups' argument to xyplot.
Here's fake data frame (you should have provided one):
DF <- data.frame(y1 = rnorm(30),
y2 = rnorm(30) + 2,
x = rep(1:10, 3),
sites = gl(3, 10, lab=LETTERS[1:3]))
## Use the reshape2 package to melt the data:
## (or use reshape() in base R)
require(reshape2)
DF1 <- melt(DF, measure.vars = c('y1', 'y2'),
variable.name = 'grp', value.name = 'y')
## and plot:
require(lattice)
p <- xyplot( y ~ x | sites, data = DF1, groups = grp,
col = c("red", "blue"), type = "b")
print(p)
Peter Ehlers
sorry for my ignorance! Francesco Nutini
> Date: Fri, 10 Dec 2010 10:13:00 -0800 > From: ehlers at ucalgary.ca > To: nutini.francesco at gmail.com > CC: r-help at r-project.org > Subject: Re: [R] [r] overlap different line in a xyplot (lattice) > > On 2010-12-10 07:04, Francesco Nutini wrote:
> > > > dear [R] users, > > is there a way to plot different data (but with the same
x-variables) in the same xyplot window?
> > There are already a similar question, but the answer is not enought
explanatory...
> > Something like this? > > x <- rep(1:10, 2) > y1 <- rnorm(10); y2 <- rnorm(10) + 2 > y <- c(y1, y2) > g <- gl(2, 10) > xyplot( y ~ x, groups = g, type = 'b') > > Peter Ehlers >
> > > > > > Thanks a lot, > > Francesco > >
>