[R-sig-Geo] Reading text files in Spatstat

[Taylor, RB]

Hello all,

I have x,y data with an associated mark. Is there a simple way of 
getting Spatstat to read this data? I have tried putting the x, y data 
in separate columns in Excel and ignoring the marks, saving it as a 
tab-delim text file (called "test"). However the as.ppp function fails 
to convert it into a ppp object.


 > test <- read.table("C:/temp/Rtest.txt")
 > as.ppp(test)
Error in as.ppp.default(test) : Can't interpret X as a point pattern


Perhaps someone can answer my simple question and tell me what I am 
doing wrong?

Thanks,
Rob
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