[R] fitting a distribution to a ecdf plot

[Frank Harrell]

Note that fitting to the ECDF will result in a distribution estimator that
has the same mean squared error as the ECDF.  That makes it difficult to see
the value of fitting.
Frank

Lathouri, Maria wrote
> 
> Dear all,
> 
> I need to plot an cumulative distribution plot of a variable and then to
> fit a distribution to that, probably a weibull or lognormal.
> 
> I have plotted the ecdf as
>> plot(ecdf(x))
> 
> but I haven't managed to fit the distribution. I have as well attached the
> data.
> 
> I would appreciate if you could help me on that.
> 
> Thank you.
> 
> Kind regards
> Maria
> 
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> 


-----
Frank Harrell
Department of Biostatistics, Vanderbilt University
--
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