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goldstone
2008 Feb 06
0
kruskal's MONANOVA algorithm
...R, SPSS (Conjoint Analysis), and SAS' proc transreg in speed
and accuracy. Currently, SAS and SPSS are giving similar results, but R's
are quite different. There is something I am misunderstanding about
acepackage and/or isoMDS.
The data looks like this:
Brand Price Life Hazard Rank
1 Goodstone $69.99 60,000 Yes 3
2 Goodstone $69.99 70,000 No 2
...
7 Pirogi $69.99 50,000 No 7
8 Pirogi $69.99 70,000 No 1
9 Pirogi $74.99 50,000 Yes 8
The ace and avas functions transform the y values into very small values of
rank, like this:
$ty
[1] -1.3552125...