[R] Plotting frequency curve over histogram
Rolf Turner
r.turner at auckland.ac.nz
Thu Dec 10 01:28:40 CET 2009
On 10/12/2009, at 12:52 PM, Gaurav Moghe wrote:
> Hello,
>
> This is a problem for which there seem to be several solutions
> online, but
> not really. My question was about plotting a curve over the
> histogram. All
> the previous posts and messages talk about generating a *density
> histogram*using (freq=F) and then plotting the density curve. However,
> I find that
> that seriously distorts my data and the plot becomes confounding to
> the
> viewer.
How does this ``distort'' your data? You are simply changing
the scale on the y-axis.
> I was wondering if there's a way to do the following 2 things:
> 1) Plot both histogram and the overlying frequency curve in one plot
If you want to keep your histogram on the ``count'' scale,
just multiply your density curve by the constant by which
you would have divided the histogram values to change
counts into density values.
> 2) Plot multiple frequency curves in a single plot
?lines
>
> I have been using the "hist" function for my job.
>
> I'd appreciate if anyone could help me with the solution
cheers,
Rolf Turner
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