1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
<H2>DESCRIPTION</H2>
<EM>v.normal</EM>
computes tests of normality on vector points.
<H2>NOTES</H2>
The tests that <EM>v.normal</EM> performs are indexed
below. The tests that are performed are specified by
giving an index, ranges of indices, or multiple thereof.
<OL>
<LI> Sample skewness and kurtosis
<LI> Geary's a-statistic and an approximate normal transformation
<LI> Extreme normal deviates
<LI> D'Agostino's D-statistic
<LI> Modified Kuiper V-statistic
<LI> Modified Watson U^2-statistic
<LI> Durbin's Exact Test (modified Kolmogorov)
<LI> Modified Anderson-Darling statistic
<LI> Modified Cramer-Von Mises W^2-statistic
<LI> Kolmogorov-Smirnov D-statistic (modified for normality testing)
<LI> Chi-Square test statistic (equal probability classes) and
the number of degrees of freedom
<LI> Shapiro-Wilk W Test
<LI> Weisberg-Binghams W'' (similar to Shapiro-Francia's W')
<LI> Royston's extension of W for large samples
<LI> Kotz Separate-Families Test for Lognormality vs. Normality
</OL>
<H2>EXAMPLE</H2>
<DL>
<DD><B>v.normal map=</B><EM>soils</EM> <B>tests=</B><EM>1-3,14</EM> <B>col=</B><EM>flt1</EM>
</DL>
computes the sample skewness and kurtosis, Geary's
a-statistic and an approximate normal transformation,
extreme normal deviates, and Royston's W for the
<EM>soils</EM> vector points.
<H2>SEE ALSO</H2>
<A HREF="v.univar.html">v.univar</A>
<H2>AUTHOR</H2>
<A HREF="http://mccauley-usa.com/">James Darrell McCauley</A>
<A HREF="mailto:darrell@mccauley-usa.com"><darrell@mccauley-usa.com></A>,
<br>when he was at:
<A HREF="http://ABE.www.ecn.purdue.edu/ABE/">Agricultural
Engineering</A>
<A HREF="http://www.purdue.edu/">Purdue University</A>
<p><i>Last changed: $Date: 2004/10/16 10:30:43 $</i>
</body>
</html>
|
