[R] Legend that is big?

[Uwe Ligges]

On 21.01.2012 14:47, Kevin Burton wrote:
> I can put a legend on a plot with something like:
>
>
>
> legend('bottom', leg.txt, horiz = TRUE, fill = colors)
>
>
>
> But what if the arrays leg.txt and colors are too big? I would still like to
> provide a legend but to save space I would like to just show small boxes
> with the color filled in so it will still fit on the plot.

The trick could be to use filled points that look like boxes:

  legend('bottom', "blah", horiz = TRUE, pch = 15, col = colors, pt.cex 
= 0.5)


> If I could adjust
> the size of the boxes (at least in one dimension) that would be desirable.
> As a bonus and if there is room I would like to label the top and bottom
> (left and right) of the legend with text indicating a minimum and maximum. I
> am relatively new to 'R' and especially 'R' graphics so any help would be
> greatly appreciated.


If you save the returned value from legend() inn some object:

lg <- legend(......)
str(lg)

you will see that there is information about the soze and location of 
the legend that can be used to calculate positions for other text() 
around....

Uwe Ligges






>
>
> Thank you.
>
>
>
> Kevin
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>
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