Leave one out correlation value equal to 0

Olga92Olga92 Member Posts: 5 Learner I
Hello everyone,
i'm trying to calculate the performance of the NN using leave one out method so for that i use cross-validation and choice Leave one out option. The problem that i get a results as following . I Don't undrestand why i got the 0 and what the micro average mean in this  case 
correlation: 0.000 +/- 0.000 (micro average: 0.683) 
 Thanks a lot 


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