signm(A, disp=True)
Extension of the scalar sign(x) to matrices.
Matrix at which to evaluate the sign function
Print warning if error in the result is estimated large instead of returning estimated error. (Default: True)
Value of the sign function at A
(if disp == False)
1-norm of the estimated error, ||err||_1 / ||A||_1
Matrix sign function.
>>> from scipy.linalg import signm, eigvals
... a = [[1,2,3], [1,2,1], [1,1,1]]
... eigvals(a) array([ 4.12488542+0.j, -0.76155718+0.j, 0.63667176+0.j])
>>> eigvals(signm(a)) array([-1.+0.j, 1.+0.j, 1.+0.j])See :
The following pages refer to to this document either explicitly or contain code examples using this.
scipy.special._ellip_harm.ellip_harm
scipy.linalg._matfuncs.signm
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