[Rd] variables in nls (PR#829)
Peter Dalgaard BSA
p.dalgaard@biostat.ku.dk
28 Jan 2001 16:22:17 +0100
Uwe Ligges <ligges@statistik.uni-dortmund.de> writes:
> Looks like a problem (?) with all.vars():
>
> temp <- matrix(1:4, 2)
> all.vars(temp ~ 3) # OK
> [1] "temp"
>
> all.vars(temp[1, ] ~ 3) # Here is the problem.
> [1] "temp" ""
>
> all.vars(temp[1, TRUE] ~ 3) # works again
> [1] "temp"
>
>
> If this is expected (?), because of an implicitly given empty variable
> name ([1, ThisOne]) for example, nls() has to be fixed:
>
>
> Just insert after the lines
>
> varNames <- varNames[is.na(match(varNames, names(start),
> nomatch = NA))]
>
> the line
>
> varNames <- varNames[varNames != ""]
Thanks for the workaround, Uwe. In the longer run it is probably
better to make all.vars skip empty variable names.
--
O__ ---- Peter Dalgaard Blegdamsvej 3
c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk) FAX: (+45) 35327907
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