[R] NLME: Limitations of using identify to interact with scatterplots?

[Douglas Bates]

Most plotting functions in the nlme package use lattice graphics
functions based on the grid package.  Identify will not work with
lattice graphics.  I'm not sure if there is a replacement.

On 8/17/06, Greg Distiller <gregd at stats.uct.ac.za> wrote:
> I have a quick question regarding the use of identify to interact with
> points on a scatterplot. My question is essentially: can identify be used
> when one is plotting model objects to generate diagnostic plots?
> Specifically I am using NLME.
> For example, I am plotting the fitted values on the x axis vs a variable
> called log2game with the following code:
>
> plot(D2C29.nlme, log2game ~ fitted(.), abline=c(0,1))
>
> and then I have tried to use identify as follows:
>
> identify(D2C29.nlme$fitted[,2],Data2$log2game,row.names(Data2))
>
> (if I leave out the [,2] on the fitted attributes then I am told that x and
> y are not the same length and it appears that this is due to the fact that
> the fitted attribute has 2 columns.)
>
> but I get an error message that "plot.new has not been called yet".
>
> I am not sure if this is because I am doing something wrong or if identify
> simply cannot be used in this context.
>
> Many thanks
>
> Greg
>
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>