Message-ID: <BF346857.D39F%sdavis2@mail.nih.gov>
Date: 2005-08-26T10:33:59Z
From: Sean Davis
Subject: Cumulative Function
In-Reply-To: <200508261115.01307.mmiller@nassp.uct.ac.za>
Will ?cumsum help?
Sean
On 8/26/05 5:15 AM, "Mark Miller" <mmiller at nassp.uct.ac.za> wrote:
> I was wandering if anyone cold advise me on a good algorithm to turn a set of
> data from its original for into its cumulative form. I have written a piece
> of code that takes the data and does essentially what a histogram function
> would do, except add to the new bin the sum in the previous bin. Once that
> is done I divide by the frequency in the last bin plus 1. I know the ecdf()
> function exists in R, but I want to use it to fit the cumulative
> distributions to the data and ecdf() produces a non-subscriptable vector and
> so fitdistr() cannot be used on it.
>
> Thanks for any help you can give
> Mark Miller
>
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