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help for ^l2cvwarp^                                          (STB-27: snp6.2)
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Least squared cross-validation for kernel bandwidth selection 
-------------------------------------------------------------

    ^l2cvwarp^ varname [^if^ exp] [^in^ range] ^,^ ^d^elta^(^#^)^ ^k^ercode^(^#^)^
         [^g^en^(^cvval mval hval^)^ ^ms^art^(^#^)^ ^me^nd^(^#^)^ ^nog^raph graph_options]


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

^l2cvwarp^ displays a graph of least squared cross-validation (CV) scores along
with a table of the five lowest CV scores and their corresponding M and h
(bandwidth) values.


Options
-------

^d^elta^(^#^)^ specifies the small bandwidth resulting from the shifting of histo-
    grams to be averaged.  This value is interpreted as the measurement
    accuracy of the observations.

^k^ercode^(^#^)^ specifies the weight function (kernel) using the following codes:

        1 = uniform
 	2 = triangle 
 	3 = Epanechnikov
 	4 = quartic (biweight)
 	5 = triweight
 	6 = Gaussian

^g^en^(^cvval mval hval^)^ specifies three new variables to contain the CV, M,
    and h, respectively.

^ms^tart^(^#^)^ and ^me^nd^(^#^)^ specify the range of M over which the BCV is calculated.
    By default, ^mstart()^ is 1 and ^mend()^ is set to about a third of the range
    of the data.

^nog^raph suppresses the graph.

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


Examples
--------

 . ^l2cvwarp snow, delta(1) kercode(6) mstart(3) me(30) xlog xlab xline(11.85)^
 . ^l2cvwarp snow, d(1) k(4) ms(5) me(25) gen(cvval1 mval1 bwidth1) nograph^


Authors
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        Isaias H. Salgado-Ugarte, Makoto Shimizu and Toru Taniuchi
        University of Tokyo, Faculty of Agriculture,
        Department of Fisheries, Yayoi 1-1-1, Bunkyo-ku
        Tokyo 113, Japan.
        FAX:    81-3-3812-0529
        EMAIL:  fes01@@tzetzal.dcaa.unam.mx


Also see
--------

    STB:  STB-27 snp6.2, STB-26 snp6.1, STB-16 snp6
On-line: help for @bandw@, @kerneld@, @warpden@, @bcvwarp@, @kernreg@