Inverse Document Frequency in K-Nearest Neighbour (K-NN) for Competition Recommendation based on Activity in Online Learning

this research develops an application that can recommend for students to determine kinds of competition based on their activity in online learning. The application uses an algorithm of artificial intelligence that can make classification a requirement of competition and match the competition based on student’s ability. This research uses a modification algorithm that text mining with TF-IDF and K-NN. Text mining is used to classification a final project student when the student wants to join in the competitions and classification kinds of competition. The K-NN algorithm is used to find near points between a final project of students and the requirement of the competition. The result of the recommendation gives an average of accuracy that is 71, 65%