Hello,
Is this a bug in codetools:
> codetools::showTree( body( glm) )
("{" (<- call (match.call)) (if (is.character family) (<- family (get
family "function" (parent.frame)))) (if (is.function family) (<-
family(family))) (if (is.null ($ family family)) ("{" (print family)
(stop "'family' not recognized"))) (if (missing data) (<- data
(environment formula))) (<- mf (match.call FALSE)) (<- m (match (c
"formula" "data" "subset" "weights" "na.action" "etastart" "mustart"
"offset") (names mf) 0L)) (<- mf ([ mf (c 1 m))) (<- ($ mf
drop.unused.levels) TRUE) (<- ([[ mf 1L) (as.name "model.frame")) (<- mf
(eval mf (parent.frame))) (switch method (return mf) 1 (stop "invalid
'method': " method)) (<- mt (attr mf "terms")) (<- Y (model.response mf
"any")) (if (== (length (dim Y)) 1L) ("{" (<- nm (rownames Y)) (<- (dim
Y) NULL) (if (! (is.null nm)) (<- (names Y) nm)))) (<- X (if (!
(is.empty.model mt)) (model.matrix mtmf contrasts) (matrix Error in
typeof(e) :
element 1 is empty;
the part of the args list of '.Internal' being evaluated was:
(x)
The problem seems to happen because of the call to matrix with a missing
argument in glm: matrix(, NROW(Y), 0L)
The fix is to rewrite showTreeCall like this :
showTreeCall <- function (e, w)
{
w$write("(")
walkCode(e[[1]], w)
for (a in as.list(e[-1])) {
if( !missing(a)){
w$write(" ")
walkCode(a, w)
}
}
w$write(")")
}
> version
_
platform i686-pc-linux-gnu
arch i686
os linux-gnu
system i686, linux-gnu
status Under development (unstable)
major 2
minor 9.0
year 2009
month 03
day 03
svn rev 48044
language R
version.string R version 2.9.0 Under development (unstable) (2009-03-03
r48044)
--
Romain Francois
Independent R Consultant
+33(0) 6 28 91 30 30
http://romainfrancois.blog.free.fr
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