[R] Kruskal's MDS results

[Jari Oksanen]

Dieter Vanderelst <Dieter.Vanderelst <at> ua.ac.be> writes:

> 

> The point is that the manual for the isoMDS function says it's stress output
is in "percent". Does this mean,
> the stress reported by isoMDS is just the stress value in MASS (which ranges
from 0 to 1) value multiplied by
> 100? I've haven't been able to find any resource that expresses stress in
values from 0 to 100. So, this
> would be a convention introduced by the authors of the package?
>
A comment about novelty of using percentages. I also had a look at some NMDS
resources, and the first I found were two Kruskal's papers that happened to be
on my desk (Psychometrika 29, 1-27 and Psychometrika 29, 115-129, both from
1964). Both of these expressed stress in percents. Certainly this is not a
convention introduced by the authors of the package, since they are much too
young to have done that prior to 1964.

Cheers, Jari Oksanen