Reading text files in Spatstat
The problem is probably in "test". Try to give us a (small) sample of test so we can reproduce your problem. Otherwise it will be hard to discover the problem. Thierry ------------------------------------------------------------------------ ---- ir. Thierry Onkelinx Instituut voor natuur- en bosonderzoek / Research Institute for Nature and Forest Cel biometrie, methodologie en kwaliteitszorg / Section biometrics, methodology and quality assurance Gaverstraat 4 9500 Geraardsbergen Belgium tel. + 32 54/436 185 Thierry.Onkelinx at inbo.be www.inbo.be Do not put your faith in what statistics say until you have carefully considered what they do not say. ~William W. Watt A statistical analysis, properly conducted, is a delicate dissection of uncertainties, a surgery of suppositions. ~M.J.Moroney
-----Oorspronkelijk bericht----- Van: r-sig-geo-bounces at stat.math.ethz.ch [mailto:r-sig-geo-bounces at stat.math.ethz.ch] Namens Taylor, RB Verzonden: dinsdag 3 juli 2007 17:11 Aan: r-sig-geo at stat.math.ethz.ch Onderwerp: Re: [R-sig-Geo] Reading text files in Spatstat Right, I have supplied the W argument now. Still no joy though....
> as.ppp(test,c(0,10,0,10),fatal=TRUE)
Error in as.ppp.default(test, c(0, 10, 0, 10), fatal = TRUE) :
Can't interpret X as a point pattern
Any ideas anyone?
Rob
Don MacQueen wrote:
The help page for as.ppp() explains that in a case like
yours (or what
I assume is yours from your description), you also need to
supply the
W argument. Try looking at the help page for the ppp() function. -Don At 1:13 PM +0100 7/3/07, Taylor, RB wrote:
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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-- Rob Taylor University of York Biology Department PO Box 373 York YO10 5YW United Kingdom Work +44 (0)1904 32 8557 Mob +44 (0)777 258 5390
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