 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| • |
If we measure
distances in centimeters instead of inches
|
|
we get different
soft assignments.
|
|
|
|
– |
It
would be much better to have a method that is
|
|
|
invariant
under linear transformations of the data
|
|
|
space
(scaling, rotating ,elongating)
|
|
|
| • |
Clusters are not
always round.
|
|
|
|
– |
It
would be good to allow different shapes for different
|
|
|
clusters.
|
|
|
| • |
Sometimes its
better to cluster by using low-density
|
|
|
regions to
define the boundaries between clusters rather
|
|
|
than using
high-density regions to define the centers of
|
|
|
clusters.
|
|