Hi all - I'm trying to generate lattice barchart graphs with missing
values, and came across the following:
This does not run. I would expect it to:
library(lattice)
D = data.frame(X=1, Y=factor(letters[2], letters[1:2]))
barchart(~ X, D, groups=Y)
Error in grid.Call.graphics("L_rect", x$x, x$y, x$width, x$height,
resolveHJust(x$just, :
invalid line type
which is simply solved by changing the factor levels:
D$Y = factor(D$Y)
barchart(~ X, D, groups=Y)
or by filling factor levels from the bottom:
D = data.frame(X=1, Y=factor(letters[1], letters[1:2]))
barchart(~ X, D, groups=Y)
However, the failure is important, because it causes the following to
fail, no matter how Y is levelled
E = data.frame(X=c(1,2,3,4), Y=factor(letters[c(1,2,1,2)], letters
[1:2]), Z=factor(c("F","F","G","H")));
barchart(~ X | Z, E, groups=Y)
Which is an example of a comparison over multiple tests Z for
different parameter Y where some Y are missing.
alternative version:
E = data.frame(X=c(1,2,3,4), Y=letters[c(1,2,1,2)], Z=letters[c
(7,7,8,9)]);
barchart(~ X | Z, E, groups=Y)
I have updated to 2.4.0 and lattice 0.14-16 and the problem still
exists.
-Alex Brown
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