Thanks a lot. I added that line. library(ellipse) plot(-2:2, type='n') shape1 = c (1, 0, 0,1) dim(shape1) = c(2,2) center1 = c(0,0) radius1 = 1 ellipse (center1, shape1, radius1)
But now it said: Error in ellipse(center, shape, radius) : dim<- : dims [product 4] do not match the length of object [200] What is wrong? I don't understand the shape and radius's meaning so I have no idea of what object's lenght. Many thanks! Sun ----- Original Message ----- From: "Patrick Burns" <[EMAIL PROTECTED]> To: "Sun" <[EMAIL PROTECTED]> Sent: Wednesday, October 27, 2004 3:51 AM Subject: Re: [R] ploting an ellipse keeps giving errors > The error message is telling you that it expects a plot to already be > there. You can do something like: > > plot(-2:2, type='n') > > Patrick Burns > > Burns Statistics > [EMAIL PROTECTED] > +44 (0)20 8525 0696 > http://www.burns-stat.com > (home of S Poetry and "A Guide for the Unwilling S User") > > Sun wrote: > > >library (ellipse) > > > >shape1 = c (1, 0, 0,1) > >dim(shape1) = c(2,2) > >ellipse (center = c(0,0), shape = shape1, radius = 1) > > > >============================= > >Error in plot.xy(xy.coords(x, y), type = type, col = col, lty = lty, ...) : > > plot.new has not been called yet > > > > > >It is really frustrating. Also what do the shape matrix, radius correspond to an ellipse function > > > >(x-x0)^2/a + (y-y0)^2/b = 1 > > > >? Please advise! > > > >Many thanks, > > > >Sun > > [[alternative HTML version deleted]] > > > >______________________________________________ > >[EMAIL PROTECTED] mailing list > >https://stat.ethz.ch/mailman/listinfo/r-help > >PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html > > > > > > > > > > > ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
