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help for ^bhatgauc^                                               [STB-53: sg128]
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Bhattacharya's method for estimating Gaussian components     
--------------------------------------------------------

      ^bhatgauc^ freqvar midpoivar [^if^ exp] [^in^ range]
                 [, ^g^en^(^gaucovar^)^ ^nog^raph graph_options]
       

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

This program calculates the parameters (mean and standard deviation) of the
dominant Gaussian component in a specified range. ^freqvar^ is the frequency
variable, and midpoivar is the midclass interval variable. ^bhatgauc^ displays
also the graphical comparison of the observed frequencies and the estimated
Gaussian component.

This routine is a new version of the previous simple program ^bhatmesd.ado^
that includes more versatile options.

Type ^help bhatado^ for information on other ado-files used in applying 
Bhattacharya's method.


Options
-------

^gen(^logdif^)^ permits to create a variable with the frequencies of the estimated
             Gaussian component. 

^nograph^ suppresses the graph drawing

^graph_options^ are any of the options allowed with ^graph, twoway^.


Remarks
-------

Besides the graph, a table containing the mean and s.d. estimated values in 
addition with r_squared information of the negatively sloped segment used is 
displayed.


Examples
--------

  . ^bhatgauc freq midpoi in 4/12^

Draws the observed frequency and the Gaussian component frequency for the
specified range. A table with the parameters and regression information is 
shown.

  . ^bhataplt freq midpoi in 4/12, gen(gauco1)^

In addition to the graph and table, the Gaussian component frequency is 
generated and included in the ^gauco1^ variable


Author
------

Isaias H. Salgado-Ugarte
Facultad de Estudios Superiores 'Zaragoza',
Biology (Fax 52-5-773-1183)
E-mail: isalgado@@servidor.unam.mx

Also see
--------

    STB: sg23 (STB-18)
On-line: ^help^ for @bhattado@, @diflogen@, @bhatmesd@, @gaussgen@, @bhataplt@