some questions about RM

dan76

hi there,

i have some question and i think one of you can answer it surely.

1. the SOM-plot: could you tell me the decrease rate of the learning factor and the radius factor or can i read it somewhere?

2. is there an operator, that shows the silhouette-coeffizient and/or the compactness of the clustering eg kmedoid?

thanks for help.

dan

IngoRM

Hi,

1. the SOM-plot: could you tell me the decrease rate of the learning factor and the radius factor or can i read it somewhere?

I had to make a look into the code - which would also has been possible for you 

However, the adaptation is done via

learnRateCurrent = learnRateStart * Math.pow((learnRateEnd / learnRateStart), (((double) time) / ((double) maxtime)));

with learnRateStart = 0.8 and learnRateEnd = 0.01.

The radius is adapted by

adaptationRadiusStart * Math.pow((adaptationRadiusEnd / adaptationRadiusStart), (((double) time) / ((double) maxtime)));

with start = 5 and end = 1.

2. is there an operator, that shows the silhouette-coeffizient and/or the compactness of the clustering eg kmedoid?

I do not get the point here. If the quesiton is: "is there a kmedoid?" the answer is "yes". If the question targets at cluster evaluation methods, you will find those in the "performance" operator group.

Cheers,
Ingo