On 3/8/2007 8:10 AM, [EMAIL PROTECTED] wrote:
> Hi,
>
> I am searching for a possibility to display a logarithimic y-axis in a
> histogram. With plot that's easy (e.g.
> plot(1:10, log="y")
> but for histograms this does not work the same way: I tried
> hist(rnorm(1000), freq=FALSE, seq(-4, 4, .5), ylim=c(0.001, 0.5), log="y")
> Which gives the expected histogram but also warnings for my log="y" command
> (""log" is not a graphical parameter in: axis(side, at, labels, tick, line,
> pos, outer, font, lty, lwd, ") and no logarithmic y-axis. Any ideas how to
> achieve that, I couldn't find anything?
I'd say from a graphical perspective it doesn't make sense to use a bar
chart for a histogram on a log scale (where should the base of the bars
go?), but if you really want to, you could do it by calling hist() with
plot=FALSE, and building it yourself using the "histogram" object that
is returned. For example,
x <- rnorm(10000)
h <- hist(x, breaks="Scott", plot=FALSE)
plot(h$mids, h$density, log="y", type='b')
Duncan Murdoch
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