Correction un DataSet generation for a correct classification (positive elements were negative in computation : corrected)

Correction un DataSet generation for a correct classification (positive elements were negative in computation : corrected)

Update main function to save results in txt file + update pom.xml to use the last veersion of java-roc

Code added (in comment) to generate aggragation of dataset after a classical learning. Result will be used to validate P-R curve generation