On 07/05/2020 3:46 a.m., Roman Olson wrote:
Dear All,
I am wondering whether function arguments autocomplete causes a bug when
additional ellipsis arguments are used.
Example:
a = function(robot) {
cat(robot, "\n")
}
a(r=5) prints 5, meaning that r is autocompleted to “robot”. Not sure if this
is normal behavior, but this does not cause problems.
This would be fine, but somehow causes problems when there is an additional
ellipsis argument that can be used to autocomplete an already existing
argument. In the example below, when we are calling sens.analysis.all,
everything starting with q is an additional argument (…). Now, k is missed
completely. And that is because there is another actual argument that starts
with k — key.legend.axes (it is assigned to 4 instead). If “k=4” is changed to
“kk=4” the problem disappears.
sens.analysis.all <- function(func, outgrid, parvec, parmin, parmax,
length.pgrid, outvname, zlim, plabs,
gridlab, mylog, outlog=FALSE, ytick=NULL,
xline=NULL, yline=NULL, mypal=topo.colors,
key.legend.axes=NULL, plot.guidance=FALSE, ... )
{
cat(..1, "\n")
cat(..2, "\n")
cat(..3, "\n")
out=1
out
}
out = sens.analysis.all(numer.wait.times.wrps, NA,
c(5.4, 0.008, 1.5), c(4.9, 0.0079, 2.0), c(5.5, 0.0090, 3.5),
length.pgrid=10, outvname="cvs", zlim=c(0.3, 2),
plabs=c("mu", "lambda", "b"), gridlab="Soil Moisture [mm]",
mylog=FALSE, outlog=FALSE, yline=2, plot.guidance=FALSE, q=3.1, k=4,
y.c=670,
realgrid=seq(630, 670, by=4), myseed=0,
nt=1000000, burnin=300000, bin.cutoff=500,
bdW.prelim=prec.struct.Mal)
I'm afraid I don't understand what you find surprising here. In your
first example, the "r" gets attached to "robot" because of partial
matching. In the second example, the "k" gets attached to
"key.legend.axes" for the same reason. This is expected behaviour. If
you don't want to allow partial matching to arguments, they need to be
placed *after* the ellipsis. Those arguments will need to be spelled
out in full.
Duncan Murdoch
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