[R] Setting plot() parameters

[Rich Shepard]

   For time series plots using zoo I want the layout to be horizontal
rectangles rather than squares. When I specify par(pin="5,2.5") an error is
returned:

Error in par(pin = "5,2.5") :
   graphical parameter "pin" has the wrong length
In addition: Warning message:
In par(pin = "5,2.5") : NAs introduced by coercion

   Is there a maximum length for the plot area? The pair (4,1.5) produces the
same error.

Rich