Peter Dalgaard BSA
p.dalgaard at biostat.ku.dk
Sat Jul 4 00:08:08 CEST 1998
Bill Simpson <wsimpson at uwinnipeg.ca> writes:
> Can someone please tell me to make a density histogram?
> hist makes one with count or relative frequency on the y-axis.
> I want the density, which is (rel freq)/(bin width)
> In the help I see:
> intensities: values f^(x[i]), as estimated density values.
> If `all(diff(breaks) == 1)', they are the relative
> frequencies `counts/n' and in general satisfy
> sum[i; f^(x[i]) (b[i+1]-b[i])] = 1, where
> which sounds like what I want but there is no info on how to get this sort
> of histogram.
freq=TRUE should do it. If you look in the code, you'll see
intensities <- counts/(n * h)
and that is what is getting used if freq=TRUE. The help text would
seem to be imprecise, though...
O__ ---- Peter Dalgaard Blegdamsvej 3
c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907
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