R help - Aug 2018 - Resetting bin size in histogram having already changed to relative frequencies

Hello again.  I am trying to alter the bin size on a histogram where I have
reset the vertical axis to relative frequency, rather than absolute.  Beneath is
a simple example (not my real data) of this:

xvals<-rnorm(1000,0,1)
xvals
hist(xvals)
h<-hist(xvals,plot=F)

h
h$counts
h$counts<-h$counts/sum(h$counts)
h$counts
plot(h,freq=T,ylab="Relative Frequency")


This gives me a plot with bin sizes of 0.5 and the relative frequency, but I
cannot reset the bin size as well.  I don't know whether the only way to do
it is to reset all the h$mids etc as well but this seems horrendously
complicated and I wonder whether I am missing something simple

Any ideas I would be thankful for   Nick Wray

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Consult the docs, please. ?hist and the "breaks" argument. Also note
the
"freq" argument, which means you should not be computing relative
frequencies manually.

Bert Gunter

"The trouble with having an open mind is that people keep coming along and
sticking things into it."
-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )


On Fri, Aug 31, 2018 at 7:42 AM Nick Wray via R-help <r-help at
r-project.org>
wrote:
> Hello again.  I am trying to alter the bin size on a histogram where I
> have reset the vertical axis to relative frequency, rather than absolute.
> Beneath is a simple example (not my real data) of this:
>
> xvals<-rnorm(1000,0,1)
> xvals
> hist(xvals)
> h<-hist(xvals,plot=F)
>
> h
> h$counts
> h$counts<-h$counts/sum(h$counts)
> h$counts
> plot(h,freq=T,ylab="Relative Frequency")
>
>
> This gives me a plot with bin sizes of 0.5 and the relative frequency, but
> I cannot reset the bin size as well.  I don't know whether the only way
to
> do it is to reset all the h$mids etc as well but this seems horrendously
> complicated and I wonder whether I am missing something simple
>
> Any ideas I would be thankful for   Nick Wray
>
>         [[alternative HTML version deleted]]
>
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