R help - Aug 2007 - polar.plot orientation and scale in plotrix

Hello all-

 

I would like to orient my polar.plot (from package plotrix) so that the
circular scale runs clockwise and the origin (ie. 0 degrees) starts at the
top of the plot.  The defaults of running the scale counter-clockwise and
beginning with 90 degrees at the top of the graph seems counter-intuitive to
me.  

 

I'm using R 2.5.0, and plotrix version 2.2-4.  

 

Many thanks,

 

Tim

 


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I think that's the standard presentation for polar plots (theta measured
from
positive x-axis) - that I've seen, anyway. But for customization you can
shift your origin for theta and define your own labels. For example, here is
a modification to the example in the help page for polar.plot():

testlen<-c(rnorm(36)*2+5)
testpos<-seq(0,350,by=10)
polar.plot(testlen,360-(testpos+90),
           main="Test Polar Plot",lwd=3,line.col=4,
           labels=seq(0,359,by=45)[c(3:1,8:4)],
           label.pos=seq(0,359,by=45))





--- Tim Sippel <tsip002 at ec.auckland.ac.nz> wrote:
> Hello all-
> 
>  
> 
> I would like to orient my polar.plot (from package plotrix) so that the
> circular scale runs clockwise and the origin (ie. 0 degrees) starts at the
> top of the plot.  The defaults of running the scale counter-clockwise and
> beginning with 90 degrees at the top of the graph seems counter-intuitive
> to
> me.  
> 
>  
> 
> I'm using R 2.5.0, and plotrix version 2.2-4.  
> 
>  
> 
> Many thanks,
> 
>  
> 
> Tim
> 
>  
> 
> 
> 	[[alternative HTML version deleted]]
> 
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