Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org
801.408.8111
> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of Duncan Murdoch
> Sent: Monday, April 27, 2009 3:48 PM
> To: Christophe Dutang
> Cc: r-help at r-project.org
> Subject: Re: [R] problem with symbol function
>
> On 27/04/2009 5:23 PM, Christophe Dutang wrote:
> > so it could be a limitation of graphics on windows?
>
> It's not graphics on Windows, but it appears to be a limitation of the
> windows() graphics device in R. It is used for bitmap plots as well as
> on-screen plots, which is why you saw the same effect in jpeg, but
> different devices are used for Postscript and PDF.
>
> When drawing lines, R handles the dash style itself, rather than using
> the built-in dashes. But it doesn't do so for circles, and doesn't
> make
> use of the Windows line styles.
>
> If you really need the dashes onscreen, you can draw the circle
> yourself. Assuming the scales are equal on both axes that's easy, just
> use
>
> > theta <- seq(0,2*pi, len=256)
> > lines(x+r*cos(theta), y+r*sin(theta), lty="dashed")
>
> (where (x,y) is the center and r is the radius). It's more work if you
> want things to appear as circles when the scales are unequal, but I
> think this works:
>
> circle <- function(x, y, inches=1, ...) {
> theta <- seq(0, 2*pi, len=256)
> lines(x + grconvertX(inches*cos(theta), "inches", "user") -
> grconvertX(0, "inches", "user"),
> y + grconvertY(inches*sin(theta), "inches", "user") -
> grconvertY(0, "inches", "user"),
> ...)
> }
>
> so you'd get the plot you wanted using
>
> circle(0, 0, inches = 1.5, fg="black",lty="dashed")
>
> The circle function is not vectorized, so it's not as useful as
> symbols,
> but it could be improved.
>
> Duncan Murdoch
>
>
> >
> > It also appears with "long dash" lines.
> >
> > x <- -4:4
> > y <- -4:4
> >
> > plot(x,y,type="n")
> >
> > symbols(0, 0, add = TRUE, circles = 1, inches = 1, fg="black",
> > lty="solid")
> >
> > symbols(0, 0, add = TRUE, circles = 1, inches = 2,
> > fg="black",lty="dashed")
> >
> > symbols(0, 0, add = TRUE, circles = 1, inches = 3,
> > fg="black",lty="longdash", lwd=2)
> >
> >
> > Le 27 avr. 09 ? 23:07, Joshua Wiley a ?crit :
> >
> >> I read that the lty=2 argument does not work on all graphics
> >> devices. You might double check that since it works on mac.
> >>
> >>
> >> Joshua Wiley
> >>
> >>
> >>
> >> ---- Original message ----
> >>> Date: Mon, 27 Apr 2009 22:58:11 +0200
> >>> From: Christophe Dutang <dutangc at gmail.com>
> >>> Subject: Re: [R] problem with symbol function
> >>> To: Joshua Wiley <jwile004 at ucr.edu>
> >>> Cc: r-help at r-project.org
> >>>
> >>> This point is ok if I download R from the Austrian mirror. R is
> >>> properly install on both computers. I also get this strange
> behavior
> >>> with R 2.7.2. There is something I'm missing...
> >>>
> >>>
> >>> Le 27 avr. 09 ? 22:54, Joshua Wiley a ?crit :
> >>>
> >>>> I am running SP3. You said earlier that you were having trouble
> >>>> downloading 2.9.0, are you sure everything downloaded and
> installed
> >>>> properly? There have been some questions about transitioning to
> the
> >>>> new build going around.
> >>>>
> >>>> Joshua Wiley
> >>>>
> >>>>
> >>>>
> >>>> ---- Original message ----
> >>>>> Date: Mon, 27 Apr 2009 22:45:26 +0200
> >>>>> From: Christophe Dutang <dutangc at gmail.com>
> >>>>> Subject: Re: [R] problem with symbol function
> >>>>> To: Joshua Wiley <jwile004 at ucr.edu>
> >>>>> Cc: r-help at r-project.org
> >>>>>
> >>>>> what is your service pack version?
> >>>>>
> >>>>> at home I use the SP2 version.
> >>>>>
> >>>>> Le 27 avr. 09 ? 22:29, Joshua Wiley a ?crit :
> >>>>>
> >>>>>> Hi Christophe,
> >>>>>>
> >>>>>> I am able to plot dashed circles on Windows. I'm afraid I do not
> >>>>>> have any suggestions for you. What happens when you try to plot
> it
> >>>>>> on Windows?
> >>>>>>
> >>>>>>
> >>>>>> Joshua Wiley
> >>>>>>
> >>>>>>
> >>>>>> ---- Original message ----
> >>>>>>> Date: Mon, 27 Apr 2009 22:15:53 +0200
> >>>>>>> From: r-help-bounces at r-project.org (on behalf of Christophe
> >>>>>>> Dutang <dutangc at gmail.com
> >>>>>>>> )
> >>>>>>> Subject: [R] problem with symbol function
> >>>>>>> To: r-help at r-project.org
> >>>>>>>
> >>>>>>> Hi all,
> >>>>>>>
> >>>>>>> I use the symbol functions to draw circles. But the argument
> lty
> >>>>>>> does
> >>>>>>> not work on windows but works correctly on my macbook:
> >>>>>>>
> >>>>>>> x <- -4:4
> >>>>>>> y <- -4:4
> >>>>>>>
> >>>>>>> plot(x,y,type="n")
> >>>>>>>
> >>>>>>> symbols(0, 0, add = TRUE, circles = 1, inches = 1, fg="black",
> >>>>>>> lty="solid")
> >>>>>>>
> >>>>>>> symbols(0, 0, add = TRUE, circles = 1, inches = 2, fg="black",
> >>>>>>> lty="dashed")
> >>>>>>>
> >>>>>>>
> >>>>>>> The second circle should be drawn with dash... it works on my
> >>>>>>> macbook
> >>>>>>> but on my PC.
> >>>>>>>
> >>>>>>> I use R 2.9.0 on windows xp home and mac os 10.5.
> >>>>>>>
> >>>>>>> Does anyone have this problem? is it a limitation of windows?
> >>>>>>>
> >>>>>>> thanks in advance
> >>>>>>>
> >>>>>>>
> >>>>>>> Christophe
> >>>>>>>
> >>>>>>> --
> >>>>>>> Christophe Dutang
> >>>>>>> Ph. D. student at ISFA, Lyon, France
> >>>>>>> website: http://dutangc.free.fr
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>> [[alternative HTML version deleted]]
> >>>>>>>
> >>>>>>> ______________________________________________
> >>>>>>> R-help at r-project.org mailing list
> >>>>>>> https://stat.ethz.ch/mailman/listinfo/r-help
> >>>>>>> PLEASE do read the posting guide http://www.R-
> project.org/posting-guide.html
> >>>>>>> and provide commented, minimal, self-contained, reproducible
> >>>>>>> code.
> >>>>> --
> >>>>> Christophe Dutang
> >>>>> Ph. D. student at ISFA, Lyon, France
> >>>>> website: http://dutangc.free.fr
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>> --
> >>> Christophe Dutang
> >>> Ph. D. student at ISFA, Lyon, France
> >>> website: http://dutangc.free.fr
> >>>
> >>>
> >>>
> >>>
> >
> > --
> > Christophe Dutang
> > Ph. D. student at ISFA, Lyon, France
> > website: http://dutangc.free.fr
> >
> >
> >
> >
> >
> > [[alternative HTML version deleted]]
> >
> >
> >
> > ---------------------------------------------------------------------
> ---
> >
> > ______________________________________________
> > R-help at r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide http://www.R-project.org/posting-
> guide.html
> > and provide commented, minimal, self-contained, reproducible code.
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-
> guide.html
> and provide commented, minimal, self-contained, reproducible code.