data ------> knowledge
Are all patterns interesting?
No. only a small fraction of the patterns potentially generated would actually be of interest to a given user.
What makes a pattern interesting?
- easily understood by humans
- valid
- potentially useful
- novel
- An interesting pattern represents knowledge.
Can a data mining system generate all of the interesting patterns?
It is often unrealistic and inefficient for data mining systems to generate all possible pattern.
1.7 Major issue in data mining
major issues:
- mining methodology
- user interaction
- efficiency and scalability可扩展性
- diversity of data types
- data mining and society