pflugshaupt@geobot.umnw.ethz.ch
2001-Nov-08 17:39 UTC
[Rd] eqscplot() in library MASS: fails when given only one point (PR#1162)
I found the following in eqscplot, library MASS: When given just one point, it fails:> eqscplot(x=1, y=1)Error in plot.window(xlim, ylim, log, asp, ...) : need finite xlim values After inserting browser() just before the last line in eqscplot() (in which plot() gets called), I found the following:> eqscplot(x=1, y=1)Called from: eqscplot(x = 1, y = 1) Browse[1]> xlim [1] NaN NaN Browse[1]> ylim [1] NaN NaN This results from the lines 35 and 36: xuin <- oxuin <- oldpin[1]/diff(xlim) yuin <- oyuin <- oldpin[2]/diff(ylim) which will give Inf values, since diff(xlim) and diff(ylim) will be zero at that point (xlim and ylim containing c(1, 1) in this case). I can't propose a patch, though, since I haven't the time to really work out how the calculation is done (sorry).> version_ platform ppc-apple-macos arch ppc os MacOS system ppc, MacOS status major 1 minor 3.1 year 2001 month 08 day 31 language R I use the MASS version which comes with the current full Mac R package (rm131_FULL.sit). If this is already fixed in a newer version of the library, I apologize for the waste of bandwidth. Cheers Kaspar Pflugshaupt -- Kaspar Pflugshaupt Geobotanisches Institut Zuerichbergstr. 38 CH-8044 Zuerich Tel. ++41 1 632 43 19 Fax ++41 1 632 12 15 mailto:pflugshaupt@geobot.umnw.ethz.ch privat:pflugshaupt@mails.ch http://www.geobot.umnw.ethz.ch -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-devel-request@stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
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