> On Jun 15, 2017, at 1:35 AM, jean-philippe > <jeanphilippe.fonta...@gssi.infn.it> wrote: > > hi david > > Thank you very much for the hack of draw.circle that you proposed me. > I don't understand some part of the code, why do you pass radius as a vector > in the function (if I understand well the purpose of the for loop) ? Also > what is ymult? > > If I set the radius to the value 0.85 as I wanted (so as a scalar), I don't > see any difference in the result when I call this function draw.circle2, the > stripes are not drawn inside the circle. I don't know if it is normal.
It certainly wasn't intended. I expected the radius argument to get used repeatedly just as it is in the original function, but remain a scalar. Did you just copy-paste my code or do your own alterations? And did you add the arguments to the new call? When I use: Your set-up surrounds this: draw.circle2(-12.85,-10.9,0.85,nv=1000,border=NULL,col="yellow",lty=1,lwd=5, density=2, angle=45) I get the attached pdf:
MWE.pdf
Description: Adobe PDF document
I don't think you are interpreting the code in the same manner as I do. When
hacking someone else code it's probably a good idea to give all the arguments
names. That way you uncover errors in the argument passing better because name
collision get flagged and the error messages become more meaningful.
Feel free to post annotations using the octothorpe method in between lines to
explain how you understand the code.
--
David.
>
>
> Thanks, best
>
>
> Jean-Philippe
>
> On 14/06/2017 19:29, David Winsemius wrote:
>>> On Jun 14, 2017, at 10:18 AM, David Winsemius <dwinsem...@comcast.net>
>>> wrote:
>>>
>>>
>>>> On Jun 14, 2017, at 9:46 AM, Jeff Newmiller <jdnew...@dcn.davis.ca.us>
>>>> wrote:
>>>>
>>>> I don't see a question. If your question is whether R supports pattern
>>>> fills, AFAIK it does not. If that is not your question, ask one.
>>>> --
>>>> Sent from my phone. Please excuse my brevity.
>>>>
>>>> On June 14, 2017 7:57:41 AM PDT, jean-philippe
>>>> <jeanphilippe.fonta...@gssi.infn.it> wrote:
>>>>> dear R users,
>>>>>
>>>>> I would like to fill a circle with yellow stripes instead of a uniform
>>>>> yellow color. To draw the circle I used the following command after
>>>>> having loaded the (very nice !) plotrix library :
>> I finally understood the question and it needs a hack to the draw.circle
>> function in plotrix since the angle and density arguments don't get passed
>> in:
>>
>> First get code for draw.circle:
>>
>> ------
>>
>> draw.circle # then copy to console and edit
>>
>> draw.circle2 <- function (x, y, radius, nv = 100, border = NULL, col = NA,
>> lty = 1,
>> density=NA, angle=45, lwd = 1 )
>> {
>> xylim <- par("usr")
>> plotdim <- par("pin")
>> ymult <- getYmult()
>> angle.inc <- 2 * pi/nv
>> angles <- seq(0, 2 * pi - angle.inc, by = angle.inc)
>> if (length(col) < length(radius))
>> col <- rep(col, length.out = length(radius))
>> for (circle in 1:length(radius)) {
>> xv <- cos(angles) * radius[circle] + x
>> yv <- sin(angles) * radius[circle] * ymult + y
>> polygon(xv, yv, border = border, col = col, lty = lty,
>> density=density, angle=angle,
>> lwd = lwd)
>> }
>> invisible(list(x = xv, y = yv))
>> }
>>
>> Now run your call to pdf with draw.circle2 instead of draw.circle
>>
>> Best;
>> David.
>>>>> library(plotrix)
>>>>> pdf("MWE.pdf",width=8, height=8)
>>>>> plot(seq(-12.5,-8.7,length.out=100),seq(-11.3,-8.3,length.out=100),type="l",col="red",xlim=c(-12.5,-8.7),ylim=c(-11.5,-8.5))
>>>>> par(new=T)
>>>>> plot(seq(-12.5,-8.7,length.out=100),seq(-11.7,-8.7,length.out=100),type="l",col="red",xlim=c(-12.5,-8.7),ylim=c(-11.5,-8.5))
>>>>> par(new=T)
>>>>> polygon(c(seq(-12.5,-8.7,length.out=100),
>>>>> rev(seq(-12.5,-8.7,length.out=100))), c(seq(-11.3,-8.3,length.out=100),
>>>>>
>>>>> rev(seq(-11.7,-8.7,length.out=100))),
>>>>> col = alpha("red",0.4), border = NA)
>>>>> par(new=T)
>>>>> draw.circle(-12.85,-10.9,0.85,nv=1000,border=NULL,col="yellow",lty=1,lwd=1)
>>>>> dev.off()
>>>>>
>>> Agree that the coding question remains unclear, so not using the offered
>>> example but responding to the natural language query. The `polygon`
>>> function has 'density' and 'angle' argument that with 'col' and 'lwd' can
>>> make slanted fill lines. This is a modification of hte first example on
>>> `?polygon`?
>>>
>>> x <- c(1:9, 8:1)
>>> y <- c(1, 2*(5:3), 2, -1, 17, 9, 8, 2:9)
>>> op <- par(mfcol = c(3, 1))
>>> for(xpd in c(FALSE, TRUE, NA)) {
>>> plot(1:10, main = paste("xpd =", xpd))
>>> box("figure", col = "pink", lwd = 3)
>>> polygon(x, y, xpd = xpd, col = "orange", density=3, angle=45, lwd = 5,
>>> border = "red")
>>> }
>>>
>>> The polygon function is _not_ in pkg::plotrix.
>>>
>>>
>>>
>>>>> It looks a bit ugly since they are not real data, but it is the
>>>>> simplest
>>>>> MWE example that I found.
>>>>>
>>>>>
>>>>> Thanks, best
>>>>>
>>>>>
>>>>> Jean-Philippe
>>>> ______________________________________________
>>>> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
>>>> 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.
>>> David Winsemius
>>> Alameda, CA, USA
>>>
>>> ______________________________________________
>>> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
>>> 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.
>> David Winsemius
>> Alameda, CA, USA
>>
>> ______________________________________________
>> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
>> 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.
>
> --
> Jean-Philippe Fontaine
> PhD Student in Astroparticle Physics,
> Gran Sasso Science Institute (GSSI),
> Viale Francesco Crispi 7,
> 67100 L'Aquila, Italy
> Mobile: +393487128593, +33615653774
>
David Winsemius
Alameda, CA, USA
______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
