def check_roundoff(self, rtol=<NUM_LIT>, atol=<NUM_LIT>):
psdev = _gvar.sdev(self.p.flat)<EOL>paltsdev = _gvar.sdev(self.palt.flat)<EOL>if not numpy.allclose(psdev, paltsdev, rtol=rtol, atol=atol):<EOL><INDENT>warnings.warn("<STR_LIT>")<EOL><DEDENT>
Check for roundoff errors in fit.p.

        Compares standard deviations from fit.p and fit.palt to see if they
        agree to within relative tolerance ``rtol`` and absolute tolerance
        ``atol``. Generates a warning if they do not (in which
        case an SVD cut might be advisable).