test 5 ... kknn 3 20 1 poly 1 : 0.84472, sd 0.01204
test 5 ... kknn 3 20 1 poly 2 : 0.84472, sd 0.01204
test 5 ... kknn 3 20 3 poly 3 : 0.90173, sd 0.02222
test 5 ... kknn 3 20 3 poly 4 : 0.90122, sd 0.02145
