calculating crooc validation accuracy

I am working on classification of genes and I havae ti finf the cross validation accuracy,

I have finished

1)ranking of genes

2)maKing FCI combination of genes

3)dividing first folds into 5 sub folds

4)CAUCAULATED testind error using FNN

7)NOW I WANT TO CALCULATE 5 FOLD CV ACCURACY ,CAN ANY ONE TELL HOW TO PROCESS PLZ