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Symptoms: curve with log x axis gets the wrong
x limits (in 2.6.1, I believe introduced in this version).
Credit goes to Mike McCoy for detecting the problem.
Demonstration:
x = 1:5
plot(x,5*exp(-x),xlim=c(0.1,1000),log="x")
xvec = 10^seq(-1,3,length=100)
lines(xvec,5*exp(-xvec))
curve(5*exp(-x),add=TRUE,col=2,lwd=3)
I believe the problem arises from this fix:
o curve() with unspecified 'from', 'to' and 'xlim' now reuses the
previous x limits, and not slightly larger ones.
and I believe the solution is to replace this ...
if (is.null(xlim))
delayedAssign("lims", {
pu <- par("usr")[1:2]
ll <- if (par("xlog"))
10^pu
else pu
if (par("xaxs") == "r")
extendrange(ll, f = -1/27)
else ll
})
with this ...
if (is.null(xlim))
delayedAssign("lims", {
pu <- par("usr")[1:2]
if (par("xaxs") == "r")
pu <- extendrange(pu, f = -1/27)
ll <- if (par("xlog"))
10^pu
else pu
ll
})
i.e., extend pu, not ll ...
cheers
Ben Bolker
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