Re: [R] Pie Chart Labels
Adam Green wrote: I am having trouble finding out how to adjust the position of labels on pie charts. For the small wedges, many of the labels overlap making it impossible to read. Is there any way to offset the labels so that they don't overlap? Hi Adam, There are three ways to adjust the positions of labels on a 3D pie chart (I'm assuming it's 3D from the word wedges. If not, the following should still be useful). The first is to change the position of the sectors by the start argument. Apart from being useful when very large sectors cause problems, changing the sector positions can sometimes alleviate minor crowding of the labels. The second is to catch the return value of the pie3D function. This is the radial positions at which the labels have been placed. You can then alter this vector and pass it as the argument labelpos. In this way you can spread out the labels for small sectors. Finally, you can leave out the labels when you call pie3D and manually place labels using the text function. The chart is drawn on a plot that spans -1 to 1 in both directions, so it is relatively easy to work out where the labels should be. A word of warning - when I read, For the small wedges, many of the labels..., I felt that I should say that pie charts in general, and 3D ones in particular, are rarely successful with more than 4 or 5 sectors. In the R-news article that included pie3D, I included a pie chart that was very difficult for the viewer to extract the information that the creator intended. Depending upon what is to be represented, you might consider whether another method might be more successful. Jim __ R-help@stat.math.ethz.ch 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] Pie Chart Labels
I am having trouble finding out how to adjust the position of labels on pie charts. For the small wedges, many of the labels overlap making it impossible to read. Is there any way to offset the labels so that they don't overlap? Adam Green USGS Patuxent Wildlife Research Center [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch 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.
Re: [R] Pie Chart Labels
The best option is to use a bar chart or dot chart instead of a pie chart. -Original Message- From: Adam Green [EMAIL PROTECTED] To: r-help@stat.math.ethz.ch r-help@stat.math.ethz.ch Sent: 9/4/07 10:21 AM Subject: [R] Pie Chart Labels I am having trouble finding out how to adjust the position of labels on pie charts. For the small wedges, many of the labels overlap making it impossible to read. Is there any way to offset the labels so that they don't overlap? Adam Green USGS Patuxent Wildlife Research Center [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch 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@stat.math.ethz.ch 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.
Re: [R] Pie Chart Labels
On 5/09/2007, at 9:37 AM, Greg Snow wrote:
The best option is to use a bar chart or dot chart instead of a pie
chart.
Right on, Red Freak!!! :-)
cheers,
Rolf Turner
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[R] pie initial angle
Dear all, I'd like to produce a simple pie chart for a customer (I know it's bad but they insist), and I have some difficulties setting the initial angle. For example: pie(c(60, 40), init.angle=14) and pie(c(80, 20), init.angle=338) both present the slices in the same direction, where: pie(c(60, 40)) pie(c(80, 20)) present the slices in different directions. I read everything I could about init.angle argument, I even played with various formulas to compute it, but I just can't figure it out. How can I preserve the desired *direction* of the slices? Many thanks in advance, Adrian -- Adrian Dusa Romanian Social Data Archive 1, Schitu Magureanu Bd 050025 Bucharest sector 5 Romania Tel./Fax: +40 21 3126618 \ +40 21 3120210 / int.101 __ R-help@stat.math.ethz.ch 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.
Re: [R] pie initial angle
Not sure I understand what you want but the clockwise= argument of pie determines whether the slice is drawn clockwise or counter clockwise. On 5/29/07, Adrian Dusa [EMAIL PROTECTED] wrote: Dear all, I'd like to produce a simple pie chart for a customer (I know it's bad but they insist), and I have some difficulties setting the initial angle. For example: pie(c(60, 40), init.angle=14) and pie(c(80, 20), init.angle=338) both present the slices in the same direction, where: pie(c(60, 40)) pie(c(80, 20)) present the slices in different directions. I read everything I could about init.angle argument, I even played with various formulas to compute it, but I just can't figure it out. How can I preserve the desired *direction* of the slices? Many thanks in advance, Adrian -- Adrian Dusa Romanian Social Data Archive 1, Schitu Magureanu Bd 050025 Bucharest sector 5 Romania Tel./Fax: +40 21 3126618 \ +40 21 3120210 / int.101 __ R-help@stat.math.ethz.ch 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@stat.math.ethz.ch 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.
Re: [R] pie chart in lattice - trellis class
Deepayan Sarkar a écrit : On 5/27/07, Patrick Giraudoux [EMAIL PROTECTED] wrote: Dear all, After going through the Lattice doc and R-help list and google, I got the feeling that there is no function in lattice or other package to compute a pie chart object of class trellis. Although pie charts are obviously not considered optimal even in the pie() doc ;-) , pie chart trellis objects would be easy positioned e.g. over a map drawn with the grids package. Can anybody confirm this absence or indicate a package/function able to draw a pie chart object of class trellis? I can confirm that lattice does not produce trellis objects representing pie charts (although I guess it can be made to do so with a user supplied panel function). However, I don't see how that would have helped you with the map example, as plotting a trellis object would also include the axes, labels, etc. What you really want is the ability to draw a circle with differently colored angular segments, which can be reasonably approximated by polygons. polygon() and grid.polygon() do these for traditional and grid graphics respectively. -Deepayan Yes indeed. Thats' likely what I am going to do. Anyway, to plot axes, labels of sophisticated graphs on maps may be interesting anyway. For instance, we are monitoring fox and hare populations in tens of game areas. Drawing observations (panel.xyplot) over time and representing the trend variations (panel.loess) at the very place on the map where the observations were done gives an absolutely interesting view where spatial relationships between trends can be visualized. Patrick __ R-help@stat.math.ethz.ch 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.
Re: [R] pie chart in lattice - trellis class
Jim Lemon a écrit :
Patrick Giraudoux wrote:
Dear all,
After going through the Lattice doc and R-help list and google, I got
the feeling that there is no function in lattice or other package to
compute a pie chart object of class trellis. Although pie charts
are obviously not considered optimal even in the pie() doc ;-) , pie
chart trellis objects would be easy positioned e.g. over a map drawn
with the grids package.
Can anybody confirm this absence or indicate a package/function able
to draw a pie chart object of class trellis?
Hi Patrick,
Floating.pie was written to solve this problem, but it only works in
standard graphics. Perhaps it might help, though.
Jim
Hey ! Looks like exactly the one I was looking for... For info to other
R-users, it can be found in the 'plotrix' package. Meanwhile I had
dropped some line codes with the same target, still not fully achieved
(the argument center is not taken into account yet... needs one line more).
Thanks a lot!
Patrick
polycirc2-function (radius=1, center = c(0, 0), edges = 50, init=pi/2,
angle=pi/2)
{
circ = NULL
angles - seq(init, init+angle, l = edges)
for (i in angles) {
circ - rbind(circ, cbind(radius * sin(i), radius * cos(i)))
}
circ-rbind(c(0,0),circ)
return(cbind(circ[, 1] + center[1], circ[,2] + center[2]))
}
pie2-function(x,col=NULL,...){
x-x/sum(x)
xC-cumsum(x)
xC-xC/xC[length(xC)]
init=0
for (i in 1:length(x)) {
angle-x[i]*2*pi
polygon(polycirc2(init=init,angle=angle),col=col[i],...)
init-xC[i]*2*pi
}
}
# example
ex-rpois(10,2)
plot(c(-1,+1),c(-1,+1),type=n,asp=1)
pie2(ex,col=c(1:length(ex)))
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Re: [R] pie chart in lattice - trellis class
P Yes indeed. Thats' likely what I am going to do. Anyway, to plot axes, labels of sophisticated graphs on maps may be interesting anyway. For instance, we are monitoring fox and hare populations in tens of game areas. Drawing observations (panel.xyplot) over time and representing the trend variations (panel.loess) at the very place on the map where the observations were done gives an absolutely interesting view where spatial relationships between trends can be visualized. Patrick There is a floating.pie in the plotrix package, and a hidden floating.pie.asp function in the ape package. I agree that grid objects would be a more elegant way to implement these ... (The standard argument is that thermometers or mini-barplots would be a better way to view this information, but I agree that pie charts seem familiar to people.) I have the feeling that I've seen pie-charts-on-maps somewhere ... searching the R Graphics Gallery for pie also produces the hexbin pie plot (which doesn't use grid either ...) Ben Bolker __ R-help@stat.math.ethz.ch 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.
Re: [R] pie chart in lattice - trellis class
In case you haven't seen this, there is an example in Paul Murrell's book that plots temperatures on a map using 'thermometer' charts. I would imagine it should be relatively straight forward to combine the floating.pie function with Paul's grid-base code (but I have not tried it myself). http://www.stat.auckland.ac.nz/~paul/RGraphics/chapter7.html See Figure 7.18 and code -Christos Christos Hatzis, Ph.D. Nuvera Biosciences, Inc. 400 West Cummings Park Suite 5350 Woburn, MA 01801 Tel: 781-938-3830 www.nuverabio.com -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ben Bolker Sent: Monday, May 28, 2007 8:51 AM To: r-help@stat.math.ethz.ch Subject: Re: [R] pie chart in lattice - trellis class P Yes indeed. Thats' likely what I am going to do. Anyway, to plot axes, labels of sophisticated graphs on maps may be interesting anyway. For instance, we are monitoring fox and hare populations in tens of game areas. Drawing observations (panel.xyplot) over time and representing the trend variations (panel.loess) at the very place on the map where the observations were done gives an absolutely interesting view where spatial relationships between trends can be visualized. Patrick There is a floating.pie in the plotrix package, and a hidden floating.pie.asp function in the ape package. I agree that grid objects would be a more elegant way to implement these ... (The standard argument is that thermometers or mini-barplots would be a better way to view this information, but I agree that pie charts seem familiar to people.) I have the feeling that I've seen pie-charts-on-maps somewhere ... searching the R Graphics Gallery for pie also produces the hexbin pie plot (which doesn't use grid either ...) Ben Bolker __ R-help@stat.math.ethz.ch 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@stat.math.ethz.ch 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] pie chart in lattice - trellis class
Dear all, After going through the Lattice doc and R-help list and google, I got the feeling that there is no function in lattice or other package to compute a pie chart object of class trellis. Although pie charts are obviously not considered optimal even in the pie() doc ;-) , pie chart trellis objects would be easy positioned e.g. over a map drawn with the grids package. Can anybody confirm this absence or indicate a package/function able to draw a pie chart object of class trellis? Thanks in advance, Patrick __ R-help@stat.math.ethz.ch 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] pie
Hi, I would like to draw a pie chart. I've already tried out the standard pie-function in the GRAPH-package. My question: is there any 'better' function or package to draw a pie chart. For example I would like to draw a 3D pie chart. Dietrich Tissen __ R-help@stat.math.ethz.ch 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.
Re: [R] pie
On Sat, 2006-10-21 at 22:46 +0200, Dietrich Tissen wrote: Hi, I would like to draw a pie chart. I've already tried out the standard pie-function in the GRAPH-package. My question: is there any 'better' function or package to draw a pie chart. For example I would like to draw a 3D pie chart. Dietrich Tissen Take a look at the plotrix package on CRAN. That being said, just say NO to 3D pie charts: When a graphic is taken over by decorative forms of computer debris, when the data measures and structures become Design Elements, when the overall design purveys Graphical Style rather than quantitative information, then the graphic may be called a duck in honor of the duck-form store... — Edward Tufte The primary source of extraneous lines in charting graphics today are the 3-D options offered by conventional spreadsheet graphics. These 3-D options serve no useful purpose; they add only ink to the chart, and more often than not make it more difficult to estimate the values represented. Even worse are the spreadsheet options that allow one to rotate the perspective. For those who would take bad graphical display to even higher levels, the Excel spreadsheet program offers the option of doughnut, radar, cylinder, cone, bubble charts. — Gary Klass Consider a ?dotchart or even ?barplot instead. For more information: http://lilt.ilstu.edu/gmklass/pos138/datadisplay/badchart.htm http://lilt.ilstu.edu/gmklass/pos138/datadisplay/sections/goodcharts.htm http://www.edwardtufte.com/tufte/books_vdqi and the two books by Cleveland: http://stat.bell-labs.com/wsc/index.html HTH, Marc Schwartz __ R-help@stat.math.ethz.ch 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] pie() with only 180°
I want to plot the results of today's elections in Austria in this typical 180°-piechart (and not 360°). Unfortunantely pie() has just an argument init.angle and no end.angle. Perhaps you know a workaround. Thomas __ R-help@stat.math.ethz.ch 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.
Re: [R] pie() with only 180°
Thomas Steiner finbref.2006 at gmail.com writes: I want to plot the results of today's elections in Austria in this typical 180°-piechart (and not 360°). Unfortunantely pie() has just an argument init.angle and no end.angle. Perhaps you know a workaround. Thomas Please look up the function fan.plot Jim Lemmon had posted last month in reply to a question by me. You may be able to tweak that and make 180-degree plots. Anupam. __ R-help@stat.math.ethz.ch 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] pie charts as symbols
Hello All I am looking at a way of plotting a series of pie charts at specified locations on an existing plot. The size of the pie chart would be proportion to the magnitude of the total value of each vector (x) and the values in x are displayed as the areas of pie slices. I am essentially trying to replicate what many GIS packages do. Symbols (using a circle) gets me part way there, but doesn't subdivide the area of the symbol. I can see that I could utilise some of the existing code in the pie function to achieve this but is there an existing function that I could use or does anyone have an elegant solution? Thanks in advance. Adam --- [[alternative HTML version deleted]] __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
[R] pie charts?
I don't suppose it's possible to create a pie chart in R? I've got 1500 some odd elements in a frame that are valued at either -1, 0 or 1 and I'd like to find a reasonable way to represent the distribution graphically...any ideas? Joshua Gramlich Piocon Technologies Chicago, IL __ [EMAIL PROTECTED] mailing list http://www.stat.math.ethz.ch/mailman/listinfo/r-help
RE: [R] pie charts?
I did find ?pie and saw the explanation as to why not to use pie charts. I may end up using it anyway, because the comparison is something like 94%,5%,1%, so the difficulty of the human eye to read area as opposed to length(as in a bar chart) doesn't make much difference in this case. Thanks for the reply. Joshua Gramlich On Thu, 2003-02-13 at 16:33, Marc Schwartz wrote: -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Joshua Gramlich Sent: Thursday, February 13, 2003 4:17 PM To: [EMAIL PROTECTED] Subject: [R] pie charts? I don't suppose it's possible to create a pie chart in R? I've got 1500 some odd elements in a frame that are valued at either -1, 0 or 1 and I'd like to find a reasonable way to represent the distribution graphically...any ideas? Joshua Gramlich Piocon Technologies Chicago, IL You can. See ?pie. However, I believe the general disposition would be to not do so. You would probably be better off with either a bar chart (see ?barplot in base R or ?barplot2 in the gregmisc package) or perhaps a Cleveland dot plot (see ?dotchart in base R) depending upon what you might wish to show. barplot2() has some additional features like plotting confidence intervals if you wish to include these in your graphic. The reasoning behind this is covered in W.S. Cleveland's Elements of Graphing Data on pages 262 - 264 in the section dealing with what he calls Pop Charts. Hope that helps, Marc Schwartz __ [EMAIL PROTECTED] mailing list http://www.stat.math.ethz.ch/mailman/listinfo/r-help __ [EMAIL PROTECTED] mailing list http://www.stat.math.ethz.ch/mailman/listinfo/r-help
