!!! Overview
[{$pagename}] is [Learning] which has the following [Attributes]
* "unlabeled" [data]
* NO Feedback
* [Pattern-recognition]

!![{$pagename}] [machine Learning]
[{$pagename}] is the [machine Learning] task of inferring a function to describe hidden structure from "unlabeled" [data] (a classification or categorization is not included in the observations). 

Since the examples provided in the [Learning] task are unlabeled, there is no evaluation of the accuracy of the structure that is output by the relevant algorithm—which is one way of distinguishing unsupervised learning from [Supervised Learning] and [Reinforcement Learning].

!! More Information
There might be more information for this subject on one of the following:
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