Envoyé depuis mon appareil Samsung -------- Message d'origine -------- De : Rolf Turner <[email protected]> Date : 14/06/2017 22:53 (GMT+01:00) À : David Winsemius <[email protected]> Cc : [email protected] Objet : Re: [R] [FORGED] Re: draw stripes in a circle in R On 15/06/17 05:29, David Winsemius wrote: > >> On Jun 14, 2017, at 10:18 AM, David Winsemius <[email protected]> wrote: >> >> >>> On Jun 14, 2017, at 9:46 AM, Jeff Newmiller <[email protected]> >>> 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 >>> <[email protected]> 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. This is just idle curiosity, since I'm not really able to contribute anything useful, but I can't resist asking: When I try to run the OP's code I get an error: > Error in alpha("red", 0.4) : could not find function "alpha". Sorry for the lack of precision, alpha is just to add some transparency to the color. This alpha parameter ranges from 0 fully transparent to 1, full color.I don't remember having loaded any package to use this function, I think it is there in base R. Why does this (apparently) not happen to anyone else? Why does the universe pick on *me*? What is the function "alpha()"? Where is it to be found? Searching on "alpha" is of course completely unproductive; there are far too many (totally irrelevant) instances. cheers, Rolf -- Technical Editor ANZJS Department of Statistics University of Auckland Phone: +64-9-373-7599 ext. 88276 ______________________________________________ [email protected] 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. [[alternative HTML version deleted]] ______________________________________________ [email protected] 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.
