"formula plotting" -> substitute pecularity
Martin Maechler <maechler at stat.math.ethz.ch> writes:
This is something between a question and a bug report.
{sometimes one should first ask on R-help before sending to R-bugs....}
..
## This ``should'' work, but does not : e2 <- substitute(T(x[1],...,x[n])*", "*N[1] == n1, list(n1=nn)) ##>> Error: ... used in an incorrect context
I think that is a bug. Simplest variant:
substitute(a(...))
Error: ... used in an incorrect context I think the basic issue is that when you use ... in a function, substitute will try to match it against the actual parameter list, e.g.
f<-function(...)substitute(a(...)) f(2)
a(2)
f(2,3,4)
a(2, 3, 4) However, when there's no ... argument to f, substitute will complain, as would any other function trying to handle ... but the semantics of substitute should be different. Robert?
O__ ---- Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._