Map Quality Measures

After the SOM has been trained, it is important to know whether it has been properly trained or not, because an optimal map for the given input data should exist. Although several map quality measures have been proposed, the SOM quality is usually measured with two evaluation criteria: resolution and topology preservation. Quantization error is the average distance between each data vector and its BMU for measuring map resolution, and topographic error represents the proportion of all data vectors for which first and second BMUs are not adjacent for the measurement of topology preservation. Thus, this error value is used as an indicator of the accuracy of the mapping in the preserving topology.

Was this article helpful?

0 0
10 Ways To Fight Off Cancer

10 Ways To Fight Off Cancer

Learning About 10 Ways Fight Off Cancer Can Have Amazing Benefits For Your Life The Best Tips On How To Keep This Killer At Bay Discovering that you or a loved one has cancer can be utterly terrifying. All the same, once you comprehend the causes of cancer and learn how to reverse those causes, you or your loved one may have more than a fighting chance of beating out cancer.

Get My Free Ebook


Post a comment