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+--- Thread: euclidean distance (/thread-17115.html)
euclidean distance - jenya56 - Mar-29-2019
Dear all,
I have two 2D arrays (size nxm) and I want to calculate the Euclidean distance between them. Meaning that the distance will be a single number whereas my arrays are nxm.
Is there a quick way to do it besides going into double loop?
Thank you!
Jenya
RE: euclidean distance - scidam - Mar-29-2019
You can use SciPy library, look at cdist function.
RE: euclidean distance - jenya56 - Mar-29-2019
Does cdist return a single number? Because I thought it would return a matrix? Thank you!
RE: euclidean distance - scidam - Mar-29-2019
Yes, it returns a matrix. Look at the following minimal example:
from scipy.spatial.distance import cdist import numpy as np np.random.seed(10) X = np.random.rand(3, 10) Y = np.random.rand(4, 10) cdist(X, Y)
Output:array([[1.00025041, 1.11616128, 1.49867252, 1.33747696],
[1.76040012, 1.26928995, 1.4958863 , 1.31219674],
[1.21858991, 1.08164983, 1.0274891 , 1.11686588]])