On Thu, Apr 22, 2010 at 5:35 PM, Georg Kaspar <[email protected]> wrote:
> Sorry for flooding the list, but i found an interesting note in > Schowengerdt (2007), p. 400: > IMHO, you're welcome:-) Would you mind assembling all this info in a nice little paragraph including full references so that the i.cluster manual can be updated? Thanks, Markus M > "The ISODATA algorithm (Ball and Hall, 1967) is a common modification of > the K-means algorithm and includes merging of clusters if their separation > is below a threshold, and splitting of a single cluster into two clusters if > it becomes too large" > > The algorithm implemented in the i.cluster module involves merging of > classes (I_cluster_merge) though no splitting function seems to be > implemented. > Since Michael Shapiro stated that he might have used the K-means algorithm, > I think we can be pretty shure that it is a modified version similar to the > isodata algorithm, which is described as migrating means in Richards (2006). > > > _______________________________________________ > grass-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/grass-user >
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