pwtools.num.distsq

pwtools.num.distsq(arrx, arry)

Squared distances between all points in arrx and arry:

$$\begin{array}{r}{r}_{ij}^2=\sum _k(\mathtt{\text{arrx}}[i,k]-\mathtt{\text{arry}}[j,k]{)}^2\\ i=1..M_x\\ j=1..M_y\\ k=1..N\end{array}$$

This is like

scipy.spatial.distance.cdist(arrx, arry)**2.0

This is a wrapper for pwtools._flib.distsq().

Parameters:

• arrx (ndarray (Mx,N), (My,N)) – Mx (My) points in N-dim space

• arry (ndarray (Mx,N), (My,N)) – Mx (My) points in N-dim space

Return type:

2d array (Mx,My)