scipy.linalg.
tanm#
- scipy.linalg.tanm(A)[source]#
- Compute the matrix tangent. - This routine uses expm to compute the matrix exponentials. - Parameters:
- A(N, N) array_like
- Input array. 
 
- Returns:
- tanm(N, N) ndarray
- Matrix tangent of A 
 
 - Examples - >>> import numpy as np >>> from scipy.linalg import tanm, sinm, cosm >>> a = np.array([[1.0, 3.0], [1.0, 4.0]]) >>> t = tanm(a) >>> t array([[ -2.00876993, -8.41880636], [ -2.80626879, -10.42757629]]) - Verify tanm(a) = sinm(a).dot(inv(cosm(a))) - >>> s = sinm(a) >>> c = cosm(a) >>> s.dot(np.linalg.inv(c)) array([[ -2.00876993, -8.41880636], [ -2.80626879, -10.42757629]])