[R] partitioning around medoids

2014-04-25 Thread Tomassini, Letizia
Hello I am running some k-medoids analysis to see if that algorithm will work better on my dataset compared to the k-means I have been using so far. When running k-means I used to specify the nstart option, equal to a certain number, depending on how many random sets of clusters I wanted. Could

[R] partitioning around medoids

2014-04-11 Thread Tomassini, Letizia
Hello I am running some k-medoids analysis to see if that algorithm will work better on my dataset compared to the k-means I have been using so far. When running k-means I used to specify the nstart option, equal to a certain number, depending on how many random sets of clusters I wanted. Could

Re: [R] kmeans function

2014-03-27 Thread Tomassini, Letizia
Carlson did a nice job explaining what the R function is doing. I can ask to SAS help as well for the SAS part. That is good idea! Da: Prof Brian Ripley [rip...@stats.ox.ac.uk] Inviato: mercoledì 26 marzo 2014 23.45 A: Tomassini, Letizia; r-h

[R] kmeans function

2014-03-26 Thread Tomassini, Letizia
Hello I need to ask questions about the k-means clustering function. Mainly I would like to know why, with the use of nstart=enough number of times, kmeans always finds the same clustering arrangements; and this happens even when the input dataset is sorted in different ways or I take out few

Re: [R] kmeans function

2014-03-26 Thread Tomassini, Letizia
Ranjan Maitra [maitra.mbox.igno...@inbox.com] Inviato: mercoledì 26 marzo 2014 12.48 A: r-h...@stat.math.ethz.ch Oggetto: Re: [R] kmeans function On Wed, 26 Mar 2014 18:35:34 + Tomassini, Letizia tomass...@vetmed.wsu.edu wrote: Hello I need to ask questions about the k-means clustering