% -*- texinfo -*- % @deftypefn {Function File} {[@var{n}, @var{c}] =} normest (@var{a}, @var{tol}) % Estimate the 2-norm of the matrix @var{a} using a power series % analysis. This is typically used for large matrices, where the cost % of calculating the @code{norm (@var{a})} is prohibitive and an approximation % to the 2-norm is acceptable. % % @var{tol} is the tolerance to which the 2-norm is calculated. By default % @var{tol} is 1e-6. @var{c} returns the number of iterations needed for % @code{normest} to converge. % @end deftypefn

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