R help - Nov 2005 - negative x y in ppp.object

Dear all,

I am using the spatstat package, but my field data was a mirror image of the
data plotted by plot.ppp(X).
Therefore I changed it using -x and -y coordinates.

However, I guess (I saw "debug") that I get some error messages
because of
that.

So, could anyone please tell me if I really can not use negative values for
x and y coordinates in a ppp.object (and relates analysis)?


Best regards,
Sara Mouro


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