NoConvergence¶

exception
astropy.wcs.
NoConvergence
(*args, best_solution=None, accuracy=None, niter=None, divergent=None, slow_conv=None, **kwargs)[source] [edit on github]¶ An error class used to report nonconvergence and/or divergence of numerical methods. It is used to report errors in the iterative solution used by the
all_world2pix()
.Attributes
best_solution ( numpy.ndarray
) Best solution achieved by the numerical method.accuracy ( numpy.ndarray
) Accuracy of thebest_solution
.niter ( int
) Number of iterations performed by the numerical method to computebest_solution
.divergent (None, numpy.ndarray
) Indices of the points inbest_solution
array for which the solution appears to be divergent. If the solution does not diverge,divergent
will be set toNone
.slow_conv (None, numpy.ndarray
) Indices of the solutions inbest_solution
array for which the solution failed to converge within the specified maximum number of iterations. If there are no nonconverging solutions (i.e., if the required accuracy has been achieved for all input data points) thenslow_conv
will be set toNone
.