Stephen, for ggplot2 you might want to check http://goo.gl/0Wx0B

On Sat, Jun 16, 2012 at 4:40 AM, Stephen Eglen <S.J.Eglen@damtp.cam.ac.uk>wrote:

>
> A recent paper on visualisation (in Neuron, a leading neuroscience
> journal) surveyed how well previous articles in this journal labelled their
> graphs (e.g. axis labelling and describing their error bars).  Of
> particular interest is that (only) 40% of plots labelled what their
> colorkey was showing (variable and units).
>
> The paper is at http://dx.doi.org/10.1016/j.neuron.2012.05.001
>
> R is not yet that prominent (compared to matlab) in Neuroscience, so I
> doubt many of the graphs were generated by levelplot() and friends.
> However, how can the colorkey be labelled?  I notice that this topic has
> been raised before, e.g.
>
>  http://tolstoy.newcastle.edu.au/R/e16/help/11/11/2281.html
>
> For now, I've done:
>
> library(lattice)
> library(grid)
> levelplot(matrix(1:9,3,3),
>          par.settings = list(layout.widths = list(axis.key.padding = 4)))
> grid.text('title here', y=unit(0.5, "npc"),
>          rot=90, x=unit(0.88, "npc"))
>
> i.e. adding some space between levelplot and colorkey.  The
> x,y positions of the grid.text call need fine-tuning once the plot is
> close to finalised.
>
> Does anyone have a better solution for vertical colorkeys?  e.g. can the
> plot objected be interrogated to work out what the central x,y value is?
>
>
> Thanks, Stephen
>
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