[R] histogram question
Erich Neuwirth
erich.neuwirth at univie.ac.at
Thu Nov 15 11:46:16 CET 2001
thanks for all the help.
one question remains.
if histogram is meant for continuous data
(which makes sense)
why is it changing the defaults of the graphics
depending on the amount of data,
and not on the scale of the data.
in both my examples, i had a data vector with numbers ranging from 0 to
10,
once with 1000 elements,
once with 100000 elements.
this is the same "quality" of data.
should the graphics defaults not stay consistent with that?
Ben Bolker wrote:
>
> The basic problem is that hist() is really designed for continuous data,
> and you're using it with discrete data. You can either say
>
> r <- rbinom(100000,10,0.5)
> hist(r,10,0.5),col=2,xlim=c(0,10),ylim=c(0,30000),
> breaks=seq(-0.5,10.5,by=0.1))
>
> so that the bins span (-0.5 to 0.5, 0.5 to 1.5, ...)
>
> or (arguably better, because it is more sensible with discrete data)
>
> barplot(table(r),space=0)
>
> On Mon, 12 Nov 2001, Erich Neuwirth wrote:
>
> > hist(rbinom(1000,10,0.5),col=2,xlim=c(0,10),ylim=c(0,300))
> > gives a histogram with "touching bars"
> >
> > hist(rbinom(100000,10,0.5),col=2,xlim=c(0,10),ylim=c(0,30000))
> > gives a histogram with space between the bars.
> >
> > is there a way to control the space betweent he bars easily?
--
Erich Neuwirth, Computer Supported Didactics Working Group
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