require(circular)
c <- circular(rep(0, 20), zero = pi/2, rotation = 'clock')
plot(c, stack = TRUE, shrink = 1.5)
Can anyone tell me why the stack is offset from 0?
_____________________________
Professor Michael Kubovy
University of Virginia
Department of Psychology
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On 29/03/2009 7:39 AM, Michael Kubovy wrote:> require(circular) > c <- circular(rep(0, 20), zero = pi/2, rotation = 'clock') > plot(c, stack = TRUE, shrink = 1.5) > > Can anyone tell me why the stack is offset from 0?It's a histogram, and the bin starts at zero, and runs to pi/10 (I'm guessing, since it appears to choose 20 bins). You can see the binning effect if you set your data to c <- circular(runif(20, 0, 2*pi), zero=pi/2, rotation='clock') Set bins to 10000 and the offset will be undetectable: plot(c, stack = TRUE, shrink = 1.5, bins=10000) Duncan Murdoch