How to convert matrix to paired list?
Dear lists
  Suppose I have an correlation matrix of four places named "A","B","C"and"D", as below:
    A     B      C    D
A   0    0.5   0.2   0.8
B  0.5   0     0.6   0.4
C  0.2   0.6   0     0.4
D  0.8   0.4   0.4   0
Is there a function that allows me to generate the paired list like this? 
A B 0.5
A C 0.2
A D 0.8
B C 0.6
B D 0.4
C D 0.4
Could you help me if you have an method. Any suggestions will be appreciated. 
Thanks

Jinlong


Jin-Long ZHANG 
Ph.D. Candidate
Institute of Botany
Chinese Academy of Sciences
Beijing 100093
E-mail: zhangjl@ibcas.ac.cn 


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