root(method=’hybr’)¶

scipy.optimize.
root
(fun, x0, args=(), method='hybr', jac=None, tol=None, callback=None, options={'eps': None, 'xtol': 1.49012e08, 'factor': 100, 'band': None, 'func': None, 'maxfev': 0, 'col_deriv': 0, 'diag': None}) Find the roots of a multivariate function using MINPACK’s hybrd and hybrj routines (modified Powell method).
See also
For documentation for the rest of the parameters, see
scipy.optimize.root
Options: col_deriv : bool
Specify whether the Jacobian function computes derivatives down the columns (faster, because there is no transpose operation).
xtol : float
The calculation will terminate if the relative error between two consecutive iterates is at most xtol.
maxfev : int
The maximum number of calls to the function. If zero, then
100*(N+1)
is the maximum where N is the number of elements in x0.band : tuple
If set to a twosequence containing the number of sub and superdiagonals within the band of the Jacobi matrix, the Jacobi matrix is considered banded (only for
fprime=None
).eps : float
A suitable step length for the forwarddifference approximation of the Jacobian (for
fprime=None
). If eps is less than the machine precision, it is assumed that the relative errors in the functions are of the order of the machine precision.factor : float
A parameter determining the initial step bound (
factor *  diag * x
). Should be in the interval(0.1, 100)
.diag : sequence
N positive entries that serve as a scale factors for the variables.