[R] xyplot: logarithmic y-axis

[Deepayan Sarkar]

On 12/15/06, RMan54 <RMan54 at cox.net> wrote:
>
> This should be simple but I am struggling. I like to easily switch in xyplot
> between a linear or logarithmic y-axis by setting a logical flag logY to
> False or True. This switch changes the scales argument of xyplot. I found
> out that the original two-dimentional data (Conc vs Time in my case) are
> converted to log10(Conc) if log=TRUE in scales, but it appears that
> functions like panel.curve need to provide the y values in log10 form (if
> there is an automatic method, I would like to know). I therefore like to
> pass on the value logY to my custom panel.curve function. How do I do that?
> I think that the value of logY should go into xyplot that should pass it on
> to the panel function and then to the panel.curve function.

It probably should, but doesn't.

-Deepayan