[R] Distribution of Data (was: your reference on this problem highly appreciated)
spencer.graves at pdf.com
Sun Jul 11 18:04:48 CEST 2004
There are many tools for this, e.g., qqnorm, density, and in
library(MASS) fitdistr. Also do a literature search on transformations
(especially to transformations to normality) and on mixture
distributions, esp. Titterington, Smith and Makov (1986) Statistical
Analysis of Finite Mixture Distributions (Wiley).
What is the nature of your application? If you tell us more about
the context, many people could tell you which distributions might be
plausible and which would not be credible except as an approximation,
e.g., a normal distribution for numbers that can not be negative and
whose distribution might be positively skewed.
hope this helps. spencer graves
p.s. PLEASE do read the posting guide!
Yong Wang wrote:
>please help me on this
>----- Message Text -----
>Dear all R users
>first, sorry for that this question might not be appropriate to ask here.
>I wanna know theories or techinques aimed at following questions:
>I have a sample, say,K(at the range from 0 to 20000); the sample data's
>central moments m(1)---m(j) are estimated(j can be large).
>also, I can use some methodology to calculate the upper and lower bound of
>the probabilty of any interested interval, say, for the interval
>with all these information, I wanna recover the distribution of the data,
>at least recover to some approximating analytic form.Does anybady know
>such theory or techiniques?
>your help will be highly appreciated.
>R-help at stat.math.ethz.ch mailing list
>PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
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