Hi:
I am coding some interactive interface using an xyplot from lattice.
When a user clicks on a panel of the xyplot, a simulation is executed and
the resulting data is plotted on the corresponding panel.
The problem is that I start with an empty data frame and only fill it as the
user request data from simulations.
And, I have found it impossible to create a conditional plot that contains
panels using an empty data frame.
For example I want:
library(lattice)
e = data.frame("a", "b", "c", "d")
xyplot(X.a. ~ X.b. | X.c. + X.d., data = e, xlim = c(c(50,60),c(60,70)),
ylim = c(c(10,20),c(20,30)), drop.unused.levels=FALSE,layout = c(2,2))
to create a empty xyplot that would look like:
50 60 70
----------------------------
10 | | |
| | |
| | |
20 ----------------------------
| | |
| | |
30 | | |
-----------------------------
but it doesn't create 4 panels it only creates a single panel:
50 60 70
---------------
10 | |
20 | |
30 | |
----------------
I am a novice in R so I hope this is not a question that is too easy for the
r-devel list.
Thanks.
Daniel.
PS:
I got around this problem by creating "dummy" data frames containing data
with the sole purpose of indicating xyplot the data ranges.
It works well, but I consider it a hack.
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