[R] How can we add a legend to a set of graphs?

[Judith Flores]

Hi,

   I have a set of 4 graphs and I need to add a legend
that is shared by those 4 graphs. This is what I
tried:

>locator(1) # I placed the cursor in the center of the
4 graphs
$x
[1] 9.299001

$y
[1] 226.3201


>legend(9.3,226.3,"and the rest of the legend
arguments")# but the legend didn't show.

    The legend only appears when I place in inside any
of the for plots. How can I place it outside these
plots, in the center.

   Your help will be very much appreciated.

Sincerely,

Judith 


       
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