def nearest_n(train_file, test_file):
"""
Performs Nearest Neighbor on data.
builds kd-tree [train]
nearest neighbor [test]
plots error [results]
"""
#initialization
train = Data()
test = Data()
kd = KDTree(1,'dc')
#train
train.extract(train_file)
x = [10,100,500,len(train.data)]
#test
test.extract(test_file)
y = errors(kd, x, train, test)
#results
graph.plot(x, y)
from data import Data
from kd_tree import KDTree
kd = KDTree(2)
d = Data()
d.extract('example.dat')
print d.data
kd.build_tree(d.data.keys()[:7])
print kd
print kd.nearest((7,7), kd.root)
#print kd