[R] again troubles with lattice
deepayan at stat.wisc.edu
Thu May 8 17:05:40 CEST 2003
On Thursday 08 May 2003 03:54 am, Wladimir Eremeev wrote:
> Dear r-help community,
> Thank you for your previous answers!
> Now I have strange behaviour of the lattice library funcitons.
> They do not draw graphics in the file when called from the script.
> I created the script file, called, for example, "a.R", containing
> the following
> color = FALSE,
> bg = "white",
You have to print the result of xyplot, which does not happen inside another
function unless you explicitly call print().
This is obviously somewhat confusing because base R graphics does not behave
this way, and has led to many similar questions on this list. help(xyplot)
An object of class ``trellis''. The `update' method can be used to
update components of the object and the `print' method (usually
called by default) will plot it on an appropriate plotting device.
and help(Lattice) has:
High level Lattice functions (like `xyplot') are different from
conventional S graphics functions because they don't actually draw
anything. Instead, they return an object of class ``trellis''
which has to be then `print'ed. This often causes confusion when
the high level functions are called inside another function (most
often `source') and hence don't produce any output.
Can you suggest any other place in the documentation where explaining this
would have helped you find it ?
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