Displaying 1 result from an estimated 1 matches for "problemforr".
2006 Jan 30
1
Varying results of sammon(), for the same data set
Hello,
I have a data set on which I run the sammon algorithm as follows:
library(MASS)
data = read.table('problemforr.dat')
y = cmdscale(data, add=TRUE)
s = sammon(data, y$points)
(In case it should be relevant, I make the data available at
http://idi.ntnu.no/~edsberg/problemforr.dat)
With R 2.2.1 on Debian Sid I always get one of two solutions (stress
1.74288 after 10 iterations or stress 1.33629 afer 9 ite...