>>>>> "ChuckB" == Charles C Berry <[EMAIL PROTECTED]>
>>>>> on Thu, 28 Dec 2006 09:35:35 -0800 writes:
ChuckB> On Thu, 28 Dec 2006, Gabor Grothendieck wrote:
>> The axes do not intersect with this command. Is it a bug?
not at all, as Chuck demonstrated below.
>> plot(c(.51, .6), bty = "n", xaxs = "i", yaxs = "i")
BTW: The same, an epsilon more efficient and also a bit more
"self-documenting", would be
plot(c(.51, .6), frame.plot = FALSE, xaxs = "i", yaxs = "i")
>> If I remove the bty = "n" then they do intersect.
ChuckB> box() is making it look like the axes are different.
ChuckB> Axis()/axis() is behaving the same way in both cases.
In other words, the axes typically do *not* intersect at all.
Because most plot() methods {and plot.default() specifically}
end up calling box() which draws a rectangle ("box") around the
plotting region, many users may have got the wrong
interpretation of intersecting axes.
They are not, as Chuck's example nicely shows :
>> par(mfrow=c(1,2))
>> plot(c(.51, .6), bty = "n", xaxs = "i", yaxs = "i")
>> box(lty=2)
>> plot(c(.51, .6), xaxs = "i", yaxs = "i")
>> axis(4,col=2)
ChuckB> [...]
Martin Maechler, ETH Zurich
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