todo

模糊聚類分析源碼。包含教學文件

TODO file
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* replace matrix inversion with resubstitution in HCCL

* find general solution for getopt.h availability

* detection of NaN while reading from stream, throw at least an error message

* matlab export

* unsolved problem: how to handle `command line arguments' on source code level

* make DDL language a XML derivative (?)

* database support (by replacing Read/WriteDDLStream)

* graphical user interface (several ideas, but no time :-( )