help for ^qexp5^

Quantile-quantile plot for data vs fitted exponential distribution ------------------------------------------------------------

^qexp5^ varname [^if^ exp] [^in^ range] [ ^, m^ean^(^#^) gr^id graph_options ]

Description -----------

^qexp5^ plots the quantiles of varname against the quantiles of a one-parameter exponential distribution, with distribution function 1 - exp(-varname / mean). The values of varname should be zero or positive.

Note: this is the original version of ^qexp^, written for Stata 5. Users of Stata 8 up should switch to ^qexp^.

Options -------

^mean(^#^)^ specifies that the mean of the fitted distribution is to be #. If ^mean()^ is not specified the mean of the data set is used.

^grid^ adds grid lines at the .05, .10, .25, .50, .75, .90, and .95 quantiles.

graph_options are any of the options allowed with ^graph, twoway^; see help for ^graph^.

Examples --------

. ^qexp5 precip^

Author ------

Nicholas J. Cox, University of Durham, U.K. n.j.cox@@durham.ac.uk

Also see --------

On-line: help for @graph@