The data mining tool that I used (also the tools for outputting the machine):
Weka: classification, clustering, association rule, decision tree ......
Cluto: Clustering
libsvm: classification
And from many posts I find there are other well-known tools that I have not used:
Orange
R
Rapidminer
SAS
SPSS
There should be other useful tools that I don't know about.
CyLiu
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