Message-ID: <CADfFDC6W-+39=RzRdf2y47Q9iWOHVXJdmtTcfYa8hKT6_ndR6g@mail.gmail.com>
Date: 2011-08-16T05:01:55Z
From: Deepayan Sarkar
Subject: lattice: How to get log base for each axis inside panel function?
In-Reply-To: <000901cc5b6d$68023600$3806a200$@us>
On Mon, Aug 15, 2011 at 10:34 PM, Mikhail Titov <mlt at gmx.us> wrote:
> Hello!
>
> I'd like to have a function to draw correct grid while using log axis with xyplot from lattice package. Right now I have the following code inside of my panel function:
>
> lim <- current.panel.limits()
> v <- latticeExtra:::logTicks(2^lim$xlim, loc=1)
> h <- latticeExtra:::logTicks(2^lim$ylim, loc=1)
> panel.abline(h=log2(h), v=log2(v), col="LightGray")
>
> Is there an easy way to get log base used for particular axis to transform data so I can write general purpose panel.grid.log?
No. The panel function gets no information regarding transformations
done to the data before being passed to it.
-Deepayan