problem creating point pattern class object with spatstat package

Yes,
thank both of you, specifying arguments has worked indeed.
Sorry about stupid question, just a rookie mistake I hope.

``The only stupid question is the one that isn't asked!''

		cheers,

			Rolf Turner

P. S. The ``name=value'' way of specifying function arguments in R
is very powerful but takes a little getting used to.

		R. T.