The first number required on the Variance header line is the number of sections in the data.
A typical experiment has 1 section. However, when combining
results from several experiments into one analysis, we would have a section for each experiment.
Then each experiment will have an error structure with its own
variance. While there may be correlations among residuals within a section,
are independent across sections.
The number may be given as the name of a design with the appropriate
number of levels as in the example below.
The following variance structure lines relate to an analysis
three variety trials with common entries.
It is assumed the data is sorted by experiment and that
there is a complete grid of plots for each experiment although
the experimental layout (number of rows and columns) may differ.
met test run
col 15 # Actually 12 12 and 15 for the sites respectively
row 34 # Actually 34 34 and 28 for the sites respectively
yld 1 !*.01
metS0.dat !section site
yld ~ site chk.site ,
!r at(site,3).row .02 at(site).col .90 .40 .036 site.test
site 2 1
12 col AR .1271 !S2=2.19
34 row AR .751
12 col AR .25 !S2=0.84
34 row AR .56
15 col ID !S2=0.19
28 row AR .38
site 0 CORUH 0.3
.2 .1 .1
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