IWLSKernel.error_book

IWLSKernel.error_book: ClassVar[dict[int, str]] = {0: 'no errors', 1: 'indefinite information matrix (no fallback)', 2: 'indefinite information matrix (fallback to identity)', 3: 'indefinite information matrix (fallback to chol_of_modified_info)', 90: 'nan acceptance prob', 91: 'indefinite information matrix (no fallback) + nan acceptance prob', 92: 'indefinite information matrix (fallback to identity) + nan acceptance prob', 93: 'indefinite information matrix (fallback to chol_of_modified_info) + nan acceptance prob'}

Dict of error codes and their meaning.