Lattice xyplot log scale labels help!

On Fri, Sep 16, 2011 at 2:17 AM, Cram Rigby <cram.rigby at gmail.com> wrote:

I have a problem with lattice log scales that I could use some help with.

I'm trying to print log y-axis scales without exponents in the labels.
?A similar thread with Deepayan' recommendation is here:
http://tolstoy.newcastle.edu.au/R/e11/help/10/09/9865.html. ?For
example, this code using xyplot produces a logged y-axis but the
labels ?(e.g. "10^1.2") are not very user-friendly:

xyplot(24:300~24:300, scales=list(y=list(log=T)))

So, trying another y.scale.component function, we get something more
agreeable for y-axis scale labels:

xyplot(24:300~24:300, scales=list(y=list(log=T)), yscale.components =
yscale.components.log10.3)


However, my problem is that occasionally I'll have to plot data that
doesn't quite "work". ?For example, in the following example, I only
get one y-axis scale label:

xyplot(11:30~11:30, scales=list(y=list(log=T)), yscale.components =
yscale.components.log10.3)

or worse, no y-axis scale labels:

xyplot(11:19~11:19, scales=list(log=T), yscale.components =
yscale.components.log10.3)


What would be most helpful is if someone can show me how to use an
xyplot y-scale function to mimic log y-scale labels generated with the
standard plot command. ?This seems to work regardless of the
underlying data range:

plot(11:30,11:30,log = "y")
plot(24:300,24:300,log="y")

That is because the standard graphics log-axis rules (which is
codified in axTicks(), and depends critically on par("yaxp")) is more
sophisticated than latticeExtra:::logTicks() (which was originally
written as a proof-of-concept demo).

To make logTicks() equally sophisticated, we need to replicate the
logic used to compute par("yaxp") (in src/main/graphics.c, I think),
which is doable, but not trivial.