[R] [ggplot2] Wind rose orientation
Thomas S. Dye
tsd at tsdye.com
Fri Dec 4 07:02:21 CET 2009
Aloha Hadley,
Thanks very much for ggplot. It's a terrific piece of work.
Specifying width = 1 in the call to geom_bar didn't change the
orientation of the coordinates. If you run the example, you'll see
that 100 is horizontal, where 90 would be on the compass.
Here is a reproducible example. The data are shown here as the
results of evaluating the read-data source code block, displayed as an
Org-mode table. A csv file is also attached (if it makes it through
the list).
#+srcname: read-data
#+begin_src R :session
wind.data <- read.csv("pmrf_windrose_info_new.csv")
#+end_src
#+resname: read-data
| "E" | 90 | 4.9 | "calm" |
| "ENE" | 67.5 | 4.9 | "calm" |
| "NE" | 45 | 4.9 | "calm" |
| "NNE" | 22.5 | 4.9 | "calm" |
| "N" | 360 | 4.9 | "calm" |
| "NNW" | 337.5 | 4.9 | "calm" |
| "NW" | 315 | 4.9 | "calm" |
| "WNW" | 292.5 | 4.9 | "calm" |
| "W" | 270 | 4.9 | "calm" |
| "WSW" | 247.5 | 4.9 | "calm" |
| "SW" | 225 | 4.9 | "calm" |
| "SSW" | 202.5 | 4.9 | "calm" |
| "S" | 180 | 4.9 | "calm" |
| "SSE" | 157.5 | 4.9 | "calm" |
| "SE" | 135 | 4.9 | "calm" |
| "ESE" | 112.5 | 4.9 | "calm" |
| "" | 90 | 9 | "< 3" |
| "" | 67.5 | 3 | "< 3" |
| "" | 45 | 3 | "< 3" |
| "" | 22.5 | 1 | "< 3" |
| "" | 360 | 1 | "< 3" |
| "" | 337.5 | 0.5 | "< 3" |
| "" | 315 | 1 | "< 3" |
| "" | 292.5 | 0.5 | "< 3" |
| "" | 270 | 1 | "< 3" |
| "" | 247.5 | 0.5 | "< 3" |
| "" | 225 | 0.5 | "< 3" |
| "" | 202.5 | 0.5 | "< 3" |
| "" | 180 | 1 | "< 3" |
| "" | 157.5 | 0.5 | "< 3" |
| "" | 135 | 3 | "< 3" |
| "" | 112.5 | 2 | "< 3" |
| "" | 90 | 6 | "4 - 12" |
| "" | 67.5 | 4 | "4 - 12" |
| "" | 45 | 5 | "4 - 12" |
| "" | 22.5 | 2 | "4 - 12" |
| "" | 360 | 5 | "4 - 12" |
| "" | 337.5 | 4 | "4 - 12" |
| "" | 315 | 7 | "4 - 12" |
| "" | 292.5 | 4 | "4 - 12" |
| "" | 270 | 6 | "4 - 12" |
| "" | 247.5 | 2 | "4 - 12" |
| "" | 225 | 4 | "4 - 12" |
| "" | 202.5 | 1.5 | "4 - 12" |
| "" | 180 | 1.5 | "4 - 12" |
| "" | 157.5 | 1.5 | "4 - 12" |
| "" | 135 | 5 | "4 - 12" |
| "" | 112.5 | 2.5 | "4 - 12" |
| "" | 90 | 0 | "13 - 24" |
| "" | 67.5 | 0 | "13 - 24" |
| "" | 45 | 0 | "13 - 24" |
| "" | 22.5 | 0 | "13 - 24" |
| "" | 360 | 1 | "13 - 24" |
| "" | 337.5 | 0.5 | "13 - 24" |
| "" | 315 | 0.5 | "13 - 24" |
| "" | 292.5 | 1 | "13 - 24" |
| "" | 270 | 1 | "13 - 24" |
| "" | 247.5 | 0 | "13 - 24" |
| "" | 225 | 0 | "13 - 24" |
| "" | 202.5 | 0 | "13 - 24" |
| "" | 180 | 0.5 | "13 - 24" |
| "" | 157.5 | 0.5 | "13 - 24" |
| "" | 135 | 1 | "13 - 24" |
| "" | 112.5 | 0 | "13 - 24" |
| "" | 90 | 0 | "> 25" |
| "" | 67.5 | 0 | "> 25" |
| "" | 45 | 0 | "> 25" |
| "" | 22.5 | 0 | "> 25" |
| "" | 360 | 0 | "> 25" |
| "" | 337.5 | 0 | "> 25" |
| "" | 315 | 0 | "> 25" |
| "" | 292.5 | 0 | "> 25" |
| "" | 270 | 0 | "> 25" |
| "" | 247.5 | 0 | "> 25" |
| "" | 225 | 0 | "> 25" |
| "" | 202.5 | 0 | "> 25" |
| "" | 180 | 0 | "> 25" |
| "" | 157.5 | 0 | "> 25" |
| "" | 135 | 0 | "> 25" |
| "" | 112.5 | 0 | "> 25" |
#+begin_src R :session
library(ggplot2)
<<read-data>>
wind <- ggplot(wind.data, aes(x = degree, y = time, fill = wind,
xlab(NULL), ylab(NULL)))
wind.bar <- wind + geom_bar(stat = "identity", width = 1)
wind.bar + coord_polar()
#+end_src
All the best,
Tom
-------------- next part --------------
On Dec 3, 2009, at 4:35 PM, hadley wickham wrote:
> Hi Thomas,
>
> I suspect you want geom_bar(stat = "identity", width = 1), but it's
> hard to be sure without a reproducible example.
>
> Hadley
>
> On Thu, Dec 3, 2009 at 8:18 PM, Thomas S. Dye <tsd at tsdye.com> wrote:
>> Aloha all,
>>
>> I love using ggplot. It took a while to get used to the grammar of
>> graphics, but it is starting to get easy now that I am thinking in a
>> more structured way.
>>
>> A question. I'm making a wind rose that I'd like to be oriented with
>> due north straight up. I've discovered that the orientation is
>> sensitive to how north is represented. When north is represented as
>> 0, the orientation looks to be shifted just a bit counter-clockwise,
>> perhaps 10 degrees. When north is represented as 360, the plot is
>> shifted clockwise, but past the point where north is straight up.
>> How
>> to get north straight up?
>>
>> I've read the book (very nice) and have skimmed through the
>> documentation without finding what I need. Any help much
>> appreciated.
>>
>> Here is the code from my Org-babel session:
>>
>> #+begin_src R :session
>> library(ggplot2)
>> wind.data <- read.csv("pmrf_windrose_info_new.csv")
>> wind <- ggplot(wind.data, aes(x = degree, y = time, fill = wind))
>> wind.bar <- wind + geom_bar(stat = "identity")
>> wind.bar + coord_polar()
>> #+end_src
>>
>> All the best,
>> Tom
>>
>> Thomas S. Dye, Ph.D.
>> T. S. Dye & Colleagues, Archaeologists, Inc.
>> Phone: (808) 529-0866 Fax: (808) 529-0884
>> http://www.tsdye.com
>>
>>
>>
>> [[alternative HTML version deleted]]
>>
>> ______________________________________________
>> R-help at r-project.org 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.
>>
>
>
>
> --
> http://had.co.nz/
More information about the R-help
mailing list