[R] Another Plotting Hint - changing fill color for points
shescott at mail.med.upenn.edu
Thu Aug 13 05:36:43 CEST 2009
I don't really use Word or .wmf but maybe try a high pixel count .png e.g.
plot(1:10, col = "red", bg = "grey", pch=21, cex =1.7)
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On Wed, Aug 12, 2009 at 6:17 PM, Jason Rupert<jasonkrupert at yahoo.com> wrote:
> This worked great.
> Regarding the second question - can you expound a bit more on the effect of the device? Right now, as shown by the test code because I am on a Windows machine and need to import the image to Word I am using WMF. Is there a better device that I should use that will help with the presolution of the points that are drawn? For example, I can see white pixesl on the blue circles, and notice that is not a perfect circle. Thanks for any information about a better way to go:
> win.metafile(file=as.character(figure_file_name_and_path), pointsize = 10)
> plot(-4:4, -4:4, type = "n")# setting up coord. system
> points(vals_201, vals_200, col = "red", bg = "grey", pch=21, cex =1..7)
> #points(vals_201, vals_200, col = "grey", bg = "white", pch=21, cex =1.5)
> points(rnorm(100)/2, rnorm(100)/2, col = "blue", bg = "blue", pch=21, cex =1.5)
> Thanks again.
> --- On Wed, 8/12/09, Sarah Goslee <sarah.goslee at gmail.com> wrote:
>> From: Sarah Goslee <sarah.goslee at gmail.com>
>> Subject: Re: [R] Another Plotting Hint - changing fill color for points
>> To: "Jason Rupert" <jasonkrupert at yahoo.com>, "r-help" <r-help at r-project.org>
>> Date: Wednesday, August 12, 2009, 4:56 PM
>> Yes, you can do that. You need to
>> specify pch in the range of 21-25,
>> and can then
>> specify both col and bg (background color). Oddly, the help
>> for this option is
>> under ?points rather than ?par or ?pch, but there are many
>> Your second question would depend heavily on the device you
>> use and its
>> associated settings, but using the above solution should
>> solve your problem.
>> On Wed, Aug 12, 2009 at 5:29 PM, Jason Rupert<jasonkrupert at yahoo.com>
>> > Is it possible to change the fill color of a point?
>> For example, the outer color being "Blue" and inner color
>> being "Grey".
>> > I've tried changing "col" and "bg", but that does not
>> seem to have the desired effect.
>> > Below is another attempt, but the pixel resolution of
>> the points function does not appear to be high enough for
>> this to work:
>> > figure_file_name_and_path<-paste("Test.wmf",
>> > vals_200<-rnorm(200)
>> > vals_201<-rnorm(200)
>> pointsize = 10)
>> > plot(-4:4, -4:4, type = "n")# setting up coord.
>> > points(vals_201, vals_200, col = "blue", bg = "white",
>> pch=19, cex =1.7)
>> > points(vals_201, vals_200, col = "grey", bg = "white",
>> pch=19, cex =1.5)
>> > points(rnorm(100)/2, rnorm(100)/2, col = "blue", bg =
>> "white", pch=19, cex =1.5)
>> > dev.off()
>> > As a second question, is there any way to increase the
>> pixel resolution of the points produced on the plot so that
>> they are perfect circles. I just noticed that the fill
>> does not perfectly fill the points on the plot and there are
>> some pixels outside the circle.
>> > Thanks again.
>> Sarah Goslee
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