[R] Problem with Example with Lattice

[Lorenzo Isella]

Dear All,
I am making my baby steps with the lattice graphic system.
I am going through the great book by Sarkar which provides plenty of
examples.
However, I notice that some of them appear to give a different result
on my system.
For instance, consider the following


library(lattice)
library(latticeExtra)

dotplot(VADeaths, type = "o",
auto.key = list(lines = TRUE, space = "right"),
main = "Death Rates in Virginia - 1940",
xlab = "Rate (per 1000)")


This should produce a plot where I have different point shapes
connected by different line shapes, but I only one point shape
connected by solid segments.
Am I misunderstanding something basic?
Many thanks

Lorenzodeepayan.sarkar at r



sessionInfo()
R version 3.4.0 (2017-04-21)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Debian GNU/Linux 8 (jessie)

Matrix products: default
BLAS: /usr/lib/libblas/libblas.so.3.0
LAPACK: /usr/lib/lapack/liblapack.so.3.0

locale:
 [1] LC_CTYPE=en_GB.utf8       LC_NUMERIC=C
  [3] LC_TIME=en_GB.utf8        LC_COLLATE=en_GB.utf8
   [5] LC_MONETARY=en_GB.utf8    LC_MESSAGES=en_GB.utf8
    [7] LC_PAPER=en_GB.utf8       LC_NAME=C
     [9] LC_ADDRESS=C              LC_TELEPHONE=C
     [11] LC_MEASUREMENT=en_GB.utf8 LC_IDENTIFICATION=C

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

other attached packages:
[1] latticeExtra_0.6-28 RColorBrewer_1.1-2  lattice_0.20-35

loaded via a namespace (and not attached):
[1] compiler_3.4.0 tools_3.4.0    grid_3.4.0