Dear all,

as far as my understanding goes, isoMDS uses the Kruskal definition of
stress, i.e. : "the square root of the ratio of the sum of squared
differences between the input distances and those of the configuration to
the sum of configuration distances squared." (as stated in the help files).
Now the definition of Kruskal also includes weights. I checked the isoMDS
code, but they call to C routines that I can't really read.

Anybody an idea about whether or not isoMDS applies those weights?

Next to that, "The input distances are allowed a monotonic transformation. "
How do I have to see that transformation within isoMDS?

Kind regards
Joris

-- 
Joris Meys
Statistical Consultant

Ghent University
Faculty of Bioscience Engineering
Department of Applied mathematics, biometrics and process control

Coupure Links 653
B-9000 Gent

tel : +32 9 264 59 87
Joris.Meys@Ugent.be
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