Hi Thomas,
Ok, the key thing that you were missing was:
scale_x_continuous(limits = c(0, 360))
Since you don't have any data at 0, and because ggplot2 doesn't know
that your variable had intrinsic meaning as a degree, it was starting
zero degrees at 22.5.
A few other tweaks below:
wind.data$wind <- factor(wind.data$wind,
c("calm", "< 3", "4 - 12", "13 - 24", "> 25"))
ggplot(wind.data, aes(x = degree, y = time, fill = wind)) +
xlab(NULL) + ylab(NULL) +
geom_bar(stat = "identity", aes(width = 22.5)) +
scale_x_continuous(limits = c(0, 360), breaks = c(0, 90, 180, 270)) +
coord_polar() +
scale_fill_brewer(pal = "Blues")
Regards,
Hadley
On Fri, Dec 4, 2009 at 12:02 AM, Thomas S. Dye <t...@tsdye.com> wrote:
> 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
>
>
>
> 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 <t...@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@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/
>
>
>
--
http://had.co.nz/
______________________________________________
R-help@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.
