On 2012-04-15 03:19, Eiko Fried wrote:
Probably a stupidly simple question, but I wouldn't know how to google it:
xyplot(neuro ~ time | UserID, data=data_sub)
creates a proper plot.
However, if I add
type = "l"
the lines do not go first through time1, then time2, then time3 etc but in
about 50% of all subjects the lines go through points seemingly random
(e.g. from 1 to 4 to 2 to 5 to 3).
The lines always start at time point 1, though.
Defining "time" as factor or ordered doesn't change this.
"neuro" is a numerical variable.
It's probably some beginner's mistake, but I don't seem to be able to solve
it.
See if this gives a clue:
library(lattice)
xyplot(Sepal.Length ~ Sepal.Width | Species, type = 'l',
data = iris)
ord <- with(iris, order(Sepal.Width))
iris2 <- iris[ord,]
xyplot(Sepal.Length ~ Sepal.Width | Species, type = 'l',
data = iris2)
Peter Ehlers
Thanks
E.
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