Re: [Rd] windrose (circular package) error in table (PR#8341)

From: Duncan Murdoch <murdoch_at_stats.uwo.ca>
Date: Tue 22 Nov 2005 - 02:19:31 GMT

On 11/21/2005 8:50 PM, Allyson.Williams@dpi.qld.gov.au wrote:
> Full_Name: Allyson Williams
> Version: 2.1.1
> OS: Windows XP
> Submission from: (NULL) (203.25.1.208)
>
>
> I'm using the 'Circular' package to plot windroses. I think the output table
> (see out2$table below) is incorrect when using different rotations. More
> precisely, when a rotation is used for the plot, the output table stuffs up.

Please send bug reports about contributed packages to the maintainer, Claudio Agostinelli <claudio@unive.it>.

Duncan Murdoch

>
> This example is from the code in the help notes, although the input data (dir,
> mag) are changed):
>
>

>>dir <- c(1:50,1:50)
>>mag <-  c(1:100)
>>
>>sample <- data.frame(dir=circular(dir,units="degrees"), mag=mag)
>>
>>par(mfrow=c(2,2))
>>res <- windrose(sample)
>>
>>## we join two pedals and keep the same shrink (scale of the plot)
>>breaks <- seq(0, 2 * pi, by = pi/6)
>>breaks <- breaks[-2]
>>out1<-windrose(sample, breaks=breaks, increment=50,main="The same but with two

>
> pedals joined", shrink=res$shrink)
>
>>#
>># change the rotation
>>sample <- data.frame(dir=circular(dir, units="degrees", rotation="clock"),

>
> mag=mag)
>
>>out2<-windrose(sample, breaks=breaks,increment=50, main="Change the rotation",

>
> shrink=res$shrink)
>
>>## use geographics template
>>sample <- data.frame(dir=circular(dir, units="degrees",

>
> template="geographics"), mag=mag)
>
>>out3<-windrose(sample, breaks=breaks, increment=50,main="Use the template

>
> 'geographics'", shrink=res$shrink)
>
>
> THESE are the output tables that seem to be incorrect (I'm sorry they're not
> clearer):
>
>>out1$table

>
> [0, 60) [60, 90) [90, 120) [120, 150) [150, 180) [180, 210) [210,
> 240) [240, 270) [270, 300) [300, 330) [330, 360)
>>From 0 to 50 0.5 0 0 0 0 0
> 0 0 0 0 0
>>From 50 to 100 0.5 0 0 0 0 0
> 0 0 0 0 0
>
>>out2$table

>
> [0, 60) [60, 90) [90, 120) [120, 150) [150, 180) [180, 210) [210,
> 240) [240, 270) [270, 300) [300, 330) [330, 360)
>>From 0 to 50 0 0 0 0 0 0
> 0 0 0 0 0.5
>>From 50 to 100 0 0 0 0 0 0
> 0 0 0 0 0.5
>
>>out3$table

>
> [0, 60) [60, 90) [90, 120) [120, 150) [150, 180) [180, 210) [210,
> 240) [240, 270) [270, 300) [300, 330) [330, 360)
>>From 0 to 50 0 0.5 0 0 0 0
> 0 0 0 0 0
>>From 50 to 100 0 0.5 0 0 0 0
> 0 0 0 0 0
>
>
>
> out1$table is correct. The data is all between 0-60degrees.
> out2$table (changed rotation) is incorrect. The data are listed as being between
> 330-360degrees.
> Out3$table (geographic rotation) is incorrect. The data are listed as being
> between 60-90degrees.
> Regardless of the rotation, the data should always be between 0-60degrees!
>
> The problem only seems to occur when 'rotating' the plot.
>
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https://stat.ethz.ch/mailman/listinfo/r-devel Received on Tue Nov 22 13:33:19 2005

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