Re: [R] How is the relation between Frequency and Counts in hist/density defined?

From: <Richard.Cotton_at_hsl.gov.uk>
Date: Mon, 23 May 2011 15:56:07 +0100

> In order to do this I can use the relation between count and density, but
   I
> would like to know if there is a way for me to predict it upfront.
   In the code for hist.default, you'll see the line    dens <- counts/(n * diff(breaks))
> Here is an example:
>
> set.seed(242)
> z = rnorm(30)
> hist_z <- hist(z)
> hist_z$counts / hist_z$density # the relation is 15
   In your example, n is 30, and the breaks are evenly spaced every 0.5.    Regards,
   Richie.
   Mathematical Sciences Unit
   [1]HSL
   [2]4D Pie Charts


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Received on Mon 23 May 2011 - 14:58:48 GMT

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