Issue
I am trying to use the following matrices and perform a dot product as shown in the code. I checked the size of the matrices and all are (3, 1) but it is throwing me error for the last two dot products.
coordinate1 = [-7.173, -2.314, 2.811]
coordinate2 = [-5.204, -3.598, 3.323]
coordinate3 = [-3.922, -3.881, 4.044]
coordinate4 = [-2.734, -3.794, 3.085]
import numpy as np
from numpy import matrix
coordinate1i=matrix(coordinate1)
coordinate2i=matrix(coordinate2)
coordinate3i=matrix(coordinate3)
coordinate4i=matrix(coordinate4)
b0 = coordinate1i - coordinate2i
b1 = coordinate3i - coordinate2i
b2 = coordinate4i - coordinate3i
n1 = np.cross(b0, b1)
n2 = np.cross(b2, b1)
n12cross = np.cross(n1,n2)
x1= np.cross(n1,b1)/np.linalg.norm(b1)
print np.shape(x1)
print np.shape(n2)
np.asarray(x1)
np.asarray(n2)
y = np.dot(x1,n2)
x = np.dot(n1,n2)
return np.degrees(np.arctan2(y, x))
Solution
By converting the matrix to array by using
n12 = np.squeeze(np.asarray(n2))
X12 = np.squeeze(np.asarray(x1))
solved the issue.
Answered By - shome
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