This looks like a bug in latticeExtra: in the c.trellis function there
are these lines:
## some prepanel functions require a 'subscripts' argument in each
'panel.args'
if ("subscripts" %in% c(names(formals(obj1$prepanel.default)),
names(formals(obj1$prepanel)))) {
But obj1$prepanel is NULL in your test case. NULL is not a legal
argument to formals(), and it now warns about it.
Duncan Murdoch
On 14/12/2017 1:12 AM, Richard M. Heiberger wrote:
library(latticeExtra)
Loading required package: lattice
Loading required package: RColorBrewer
t11 <- xyplot(1 ~ 1)
t11
c(t11, t11)
Warning message:
In formals(fun) : argument is not a function
version
_
platform x86_64-w64-mingw32
arch x86_64
os mingw32
system x86_64, mingw32
status Patched
major 3
minor 4.3
year 2017
month 12
day 12
svn rev 73903
language R
version.string R version 3.4.3 Patched (2017-12-12 r73903)
nickname Kite-Eating Tree
the c.trellis seems to work correctly except for the new warning.
There was no warning in 3.3.3.
I first noticed it in 3.4.1
the c.trellis function itself is not changed between 3.3.3 and 3.4.3 Patched.
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______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
