[R] controlling plot spacing?

[Bill Simpson]

  Suppose I have the bottom axis of a plot that looks like:

----+----+----+----+----+----+----
    |    |    |    |    |    |


    1    2    3    4    5    6


          Axis title

1. How do I reduce the gap between the ends of the ticks and the axis
labels (numbers)?

2. How do I vary the gap between the bottom of the axis labels and the top
of the axis title?

I have looked in various places (help for par, axis, plot) but haven't
found the solutions.  Thanks for any help.

Bill Simpson

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