R devel - Feb 2008 - Surprising behaviour of levelplot in lattice package

Hi Deepayan,

levelplot from the lattice package produces a peculiar output when
called on a matrix whose column or row names contained duplicated
elements. In particular, the plot contains white stripes, and the
arrangement of data regions and axes labels seems messed up. I did not
see this documented (my apologies if this is an oversight) and guess
that it is unintended:


library("lattice")
m = matrix(runif(12L), ncol=3L)
colnames(m) = c("A", "A", "B")
rownames(m) = c("x", "y", "y", "z")
print(levelplot(m))



Best wishes
 Wolfgang

------------------------------------------------------------------
Wolfgang Huber  EBI/EMBL  Cambridge UK  http://www.ebi.ac.uk/huber


> sessionInfo()
R version 2.7.0 Under development (unstable) (2008-02-13 r44450)
x86_64-unknown-linux-gnu

locale:
LC_CTYPE=it_IT.UTF-8;LC_NUMERIC=C;LC_TIME=it_IT.UTF-8;LC_COLLATE=it_IT.UTF-8;LC_MONETARY=it_IT.UTF-8;LC_MESSAGES=it_IT.UTF-8;LC_PAPER=it_IT.UTF-8;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=it_IT.UTF-8;LC_IDENTIFICATION=C

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

other attached packages:
[1] lattice_0.17-4 fortunes_1.3-4

loaded via a namespace (and not attached):
[1] grid_2.7.0
>

On 2/13/08, Wolfgang Huber <huber at ebi.ac.uk>
wrote:
> Hi Deepayan,
>
> levelplot from the lattice package produces a peculiar output when
> called on a matrix whose column or row names contained duplicated
> elements. In particular, the plot contains white stripes, and the
> arrangement of data regions and axes labels seems messed up. I did not
> see this documented (my apologies if this is an oversight) and guess
> that it is unintended:
Yes, the current design does not anticipate the possibility of
duplicated row and column names. A fix may or may not be simple; I
will look into it.

-Deepayan

>
>
> library("lattice")
> m = matrix(runif(12L), ncol=3L)
> colnames(m) = c("A", "A", "B")
> rownames(m) = c("x", "y", "y", "z")
> print(levelplot(m))
>
>
>
> Best wishes
>  Wolfgang
>
> ------------------------------------------------------------------
> Wolfgang Huber  EBI/EMBL  Cambridge UK  http://www.ebi.ac.uk/huber
>
>
>
> > sessionInfo()
> R version 2.7.0 Under development (unstable) (2008-02-13 r44450)
> x86_64-unknown-linux-gnu
>
> locale:
>
LC_CTYPE=it_IT.UTF-8;LC_NUMERIC=C;LC_TIME=it_IT.UTF-8;LC_COLLATE=it_IT.UTF-8;LC_MONETARY=it_IT.UTF-8;LC_MESSAGES=it_IT.UTF-8;LC_PAPER=it_IT.UTF-8;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=it_IT.UTF-8;LC_IDENTIFICATION=C
>
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  methods   base
>
> other attached packages:
> [1] lattice_0.17-4 fortunes_1.3-4
>
> loaded via a namespace (and not attached):
> [1] grid_2.7.0
> >
>
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
>

On 2/13/08, Deepayan Sarkar <deepayan.sarkar at gmail.com>
wrote:
> On 2/13/08, Wolfgang Huber <huber at ebi.ac.uk> wrote:
> > Hi Deepayan,
> >
> > levelplot from the lattice package produces a peculiar output when
> > called on a matrix whose column or row names contained duplicated
> > elements. In particular, the plot contains white stripes, and the
> > arrangement of data regions and axes labels seems messed up. I did not
> > see this documented (my apologies if this is an oversight) and guess
> > that it is unintended:
>
> Yes, the current design does not anticipate the possibility of
> duplicated row and column names. A fix may or may not be simple; I
> will look into it.
Actually, the fix should be easy. A workaround is

levelplot(m, ylim = colnames(m), xlim = rownames(m))

-Deepayan