| SOM Toolbox | Online documentation | http://www.cis.hut.fi/projects/somtoolbox/ |
[t,r,Cd,S] = som_gapindex(sM, base, between)
SOM_GAPINDEX Gap clustering evaluation index.
[t,r] = som_gapindex(sM, base, [between])
Input and output arguments ([]'s are optional):
sM (struct) map struct
base (vector) clusters indeces for each map unit, map units
with index<=0 or NaN are not taken into account
[between] (vector) indices of prototypes which are "between" clusters:
the associated distances are doubled
t (scalar) Gap index index for the clustering (=mean(r))
r (vector) maximum Gap index for each cluster (size max(base) x 1)
See also KMEANS, KMEANS_CLUSTERS, SOM_GAPINDEX.