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import numpy as np
from scipy.spatial.distance import cdist, pdist
def dist(x1,x2=None,metric='sqeuclidean'):
"""Compute distance between samples in x1 and x2"""
if x2 is None:
return pdist(x1,metric=metric)
else:
return cdist(x1,x2,metric=metric)
def dots(*args):
""" Stupid but nice dots function for multiple matrix multiply """
return reduce(np.dot,args)
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