[R] is there a way to create legends automatically?

[Bill Simpson]

>   To "automatically" create a legend you can write a small function that
> plots your data and then generates a legend.  An example is below: the
> only slightly tricky thing is automatically generating the correct
> placement of the legend.  I've chosen here to put it in the upper
> left-hand corner.  It would be wonderful to be able to somehow know where
> to put it that it wouldn't overlap any of the data, but short of expanding
> the plot range beyond the range of the data I don't see that this is
> possible to do automatically.
How about automatically calling locator()? Then the user clicks on the
spot where the legend should appear. ?legend mentions that "a
call to the function `locator' can be used in place of the `x' and
`y' arguments".


Bill

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