Re: [R] [FORGED] Re: draw stripes in a circle in R

2017-06-14 Thread Rolf Turner 

On 15/06/17 13:51, David Winsemius wrote:



On Jun 14, 2017, at 5:52 PM, Jeff Newmiller  wrote:

Sigh. I never load packages in .Rprofile to avoid the irreproducibility trap. 
Might seem drastic to some, but I don't feel much pain because I almost always 
edit my code in a file rather than on the fly at the console, and re-run it 
frequently from a fresh R process to check my progress.


Yes, . But I am a long-time user of the rms/Hmisc combo, as well as the 
survival package, so near the top of my .Rprofile is:

require(lattice)
require(sos)
require(rms)

Should I be ashamed of that?

I suppose I should, and I _am_ ashamed of some of the other stuff in
there  ,  ... and I've been meaning to address my
manifold deficiencies w.r.t. irreproducibility by moving to RStudio,
but I keep putting it off.



This is getting *way* off topic ... but why does using RStudio help with 
the irreproducibility problem?  I thought that RStudio just made it 
easier to point-and-click.  For those who like doing that sort of thing.
(I tend to believe the dictum that a GUI makes it easy to do easy things 
and impossible to do hard things.)


cheers,

Rolf

--
Technical Editor ANZJS
Department of Statistics
University of Auckland
Phone: +64-9-373-7599 ext. 88276

__
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Re: [R] [FORGED] Re: draw stripes in a circle in R

2017-06-14 Thread David Winsemius 

> On Jun 14, 2017, at 5:52 PM, Jeff Newmiller  wrote:
> 
> Sigh. I never load packages in .Rprofile to avoid the irreproducibility trap. 
> Might seem drastic to some, but I don't feel much pain because I almost 
> always edit my code in a file rather than on the fly at the console, and 
> re-run it frequently from a fresh R process to check my progress. 

Yes, . But I am a long-time user of the rms/Hmisc combo, as well as the 
survival package, so near the top of my .Rprofile is:

require(lattice)
require(sos)
require(rms)

Should I be ashamed of that?

I suppose I should, and I _am_ ashamed of some of the other stuff in there  
,  ... and I've been meaning to address my manifold 
deficiencies w.r.t. irreproducibility by moving to RStudio, but I keep putting 
it off.

-- 
David.

> -- 
> Sent from my phone. Please excuse my brevity.
> 
> On June 14, 2017 3:27:15 PM PDT, David Winsemius  
> wrote:
>> 
>>> On Jun 14, 2017, at 1:53 PM, Rolf Turner 
>> wrote:
>>> 
>>> On 15/06/17 05:29, David Winsemius wrote:
> On Jun 14, 2017, at 10:18 AM, David Winsemius
>>  wrote:
> 
> 
>> On Jun 14, 2017, at 9:46 AM, Jeff Newmiller
>>  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
>>  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".
>>> 
>>> 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?
>> 
>> I discovered some time ago that I no longer needed to load the ggplot2
>> package. I wasn't entirely happy to make this discovery since I stilll
>> cling to the old lattice style. Eventually I figgured out that it was
>> because one of packages that I load in my .Rprofile-file had changed
>> its imports. The `alpha` function I see is from ggplot2. Resistance is
>> futile. I've now been partially assimilated.
>> 
>> 
>>> 
>>> 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
>> 
>> David Winsemius
>> Alameda, CA, USA

David Winsemius
Alameda, CA, USA

__
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.

Re: [R] [FORGED] Re: draw stripes in a circle in R

2017-06-14 Thread Jeff Newmiller 
Sigh. I never load packages in .Rprofile to avoid the irreproducibility trap. 
Might seem drastic to some, but I don't feel much pain because I almost always 
edit my code in a file rather than on the fly at the console, and re-run it 
frequently from a fresh R process to check my progress. 
-- 
Sent from my phone. Please excuse my brevity.

On June 14, 2017 3:27:15 PM PDT, David Winsemius  wrote:
>
>> On Jun 14, 2017, at 1:53 PM, Rolf Turner 
>wrote:
>> 
>> On 15/06/17 05:29, David Winsemius wrote:
 On Jun 14, 2017, at 10:18 AM, David Winsemius
> wrote:
 
 
> On Jun 14, 2017, at 9:46 AM, Jeff Newmiller
> 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
> 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".
>> 
>> 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?
>
>I discovered some time ago that I no longer needed to load the ggplot2
>package. I wasn't entirely happy to make this discovery since I stilll
>cling to the old lattice style. Eventually I figgured out that it was
>because one of packages that I load in my .Rprofile-file had changed
>its imports. The `alpha` function I see is from ggplot2. Resistance is
>futile. I've now been partially assimilated.
>
>
>> 
>> 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
>
>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.

Re: [R] [FORGED] Re: draw stripes in a circle in R

2017-06-14 Thread Rolf Turner 

On 15/06/17 10:27, David Winsemius wrote:



On Jun 14, 2017, at 1:53 PM, Rolf Turner  wrote:





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?


I discovered some time ago that I no longer needed to load the
ggplot2 package. I wasn't entirely happy to make this discovery since
I stilll cling to the old lattice style. Eventually I figgured out
that it was because one of packages that I load in my .Rprofile-file
had changed its imports. The `alpha` function I see is from ggplot2.
Resistance is futile. I've now been partially assimilated.



N'ya-hah!  The light dawns!  Thank you.

cheers,

Rolf

--
Technical Editor ANZJS
Department of Statistics
University of Auckland
Phone: +64-9-373-7599 ext. 88276

__
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.

Re: [R] [FORGED] Re: draw stripes in a circle in R

2017-06-14 Thread Jeff Newmiller 
Package 'scales' has the alpha function... associated with ggplot2. A bit out 
of place here if that is the origin. Yes, we are squarely in non-reproducible 
example territory, also known as the Twilight Zone.
-- 
Sent from my phone. Please excuse my brevity.

On June 14, 2017 1:53:21 PM PDT, Rolf Turner  wrote:
>On 15/06/17 05:29, David Winsemius wrote:
>> 
>>> On Jun 14, 2017, at 10:18 AM, David Winsemius
> wrote:
>>>
>>>
 On Jun 14, 2017, at 9:46 AM, Jeff Newmiller
> 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
> 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".
>
>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

__
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.

Re: [R] [FORGED] Re: draw stripes in a circle in R

2017-06-14 Thread David Winsemius 

> On Jun 14, 2017, at 1:53 PM, Rolf Turner  wrote:
> 
> On 15/06/17 05:29, David Winsemius wrote:
>>> On Jun 14, 2017, at 10:18 AM, David Winsemius  
>>> wrote:
>>> 
>>> 
 On Jun 14, 2017, at 9:46 AM, Jeff Newmiller  
 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 
  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".
> 
> 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?

I discovered some time ago that I no longer needed to load the ggplot2 package. 
I wasn't entirely happy to make this discovery since I stilll cling to the old 
lattice style. Eventually I figgured out that it was because one of packages 
that I load in my .Rprofile-file had changed its imports. The `alpha` function 
I see is from ggplot2. Resistance is futile. I've now been partially 
assimilated.


> 
> 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

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.

Re: [R] [FORGED] Re: draw stripes in a circle in R

2017-06-14 Thread Jim Lemon 
Hi Jean-Phillipe,
Thanks for the plug on plotrix. Because of that I will suggest a gross
hack that will do almost what you want:

# your code down to draw.circle
segments(c(-12.7,-12.7),c(-11.2,-10.6),c(-12,-12),
 c(-10.75,-10.15),col="white",lwd=28)
draw.circle(-12.85,-10.9,0.85,nv=1000,border=NULL,
col=NA,lty=1,lwd=1)
box()
dev.off()

Your problem is that plotrix is written in base graphics, which is
simple to understand, but does not support layered graphics. Thus I
have to do the striping over the yellow circle and avoid overwriting
the big red stripe. You should do this using the grid graphic system,
but that would take too large a chunk of my morning to write an
example for you.

To Rolf - It happened to me as well, but because I saw Venus smiling
at me in the sky this morning I was granted the knowledge that it was
a function that had not been properly introduced to us and simply
replaced it with "red". Such are the benefits of evidence-based
astrology.

Jim


On Thu, Jun 15, 2017 at 8:04 AM, jeanphilippe.fontaine
<jeanphilippe.fonta...@gssi.infn.it> wrote:
>
>
>
>
>
>
> Envoyé depuis mon appareil Samsung
>
>  Message d'origine 
> De : Rolf Turner <r.tur...@auckland.ac.nz>
> Date : 14/06/2017  22:53  (GMT+01:00)
> À : David Winsemius <dwinsem...@comcast.net>
> Cc : r-help@r-project.org
> 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 <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.
>
> 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
>
> __
> R

Re: [R] [FORGED] Re: draw stripes in a circle in R

2017-06-14 Thread jeanphilippe.fontaine 






Envoyé depuis mon appareil Samsung

 Message d'origine 
De : Rolf Turner <r.tur...@auckland.ac.nz> 
Date : 14/06/2017  22:53  (GMT+01:00) 
À : David Winsemius <dwinsem...@comcast.net> 
Cc : r-help@r-project.org 
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 <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.

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

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Re: [R] [FORGED] Re: draw stripes in a circle in R

2017-06-14 Thread Rolf Turner 

On 15/06/17 05:29, David Winsemius wrote:



On Jun 14, 2017, at 10:18 AM, David Winsemius  wrote:



On Jun 14, 2017, at 9:46 AM, Jeff Newmiller  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 
 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".


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

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