np.polynomial.Polynomial([1]) Polynomial([ 1.], [-1., 1.]) np.polynomial.Polynomial([1]).roots() Traceback (most recent call last): File "<pyshell#140>", line 1, in <module> np.polynomial.Polynomial([1]).roots() File "<string>", line 485, in roots File "C:\Programs\Python25\lib\site-packages\numpy\polynomial\polyutils.py",
For the lag polynomials I have cases where the order is zero, but roots raises a ValueError. Is this intended? Then, I need to catch it in my code. I haven't checked yet if my other parts will go through with empty roots. line 280, in mapdomain [x] = as_series([x], trim=False) File "C:\Programs\Python25\lib\site-packages\numpy\polynomial\polyutils.py", line 137, in as_series raise ValueError("Coefficient array is empty") ValueError: Coefficient array is empty Josef