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help for ^pbeta4^
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Probability plot for data compared with fitted beta distribution
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^pbeta4^ varname [^if^ exp] [^in^ range] [ ^,^ ^a^lpha^(^#^)^ ^b^eta^(^#^)^ ^gr^id
graph_options ]
Description
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^pbeta4^ produces a probability plot for varname compared with a
two-parameter beta distribution with shape parameters alpha and beta. By
default, alpha and beta are taken from S_2 and S_3, which is where
^beta4^ puts maximum likelihood estimates of them.
Note: this is the original version of ^pbeta^, written for Stata 4.
Users of Stata 8 up should switch to ^pbeta^.
Options
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^alpha(^#^)^ sets alpha to #.
^beta(^#^)^ sets beta to #.
^grid^ is equivalent to ^yline(.25,.5,.75) xline(.25,.5,.75)^.
graph_options are any of the options allowed with ^graph, twoway^; see
help for ^graph^.
Example
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. ^beta4 hail^
. ^pbeta4 hail^
Author
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Nicholas J. Cox, University of Durham, U.K.
n.j.cox@@durham.ac.uk
Also see
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On-line: help for @graph@, @beta4@ (if installed), @qbeta4@ (if installed)