w - positive 1-d sequence of weights bbox - 2-sequence specifying the boundary of
the approximation interval. By default, bbox=[x,x[-1]]
k=3 - degree of the univariate spline. s - positive smoothing factor defined for
- estimation condition:
- sum((w[i]*(y[i]-s(x[i])))**2,axis=0) <= s
Default s=len(w) which should be a good value if 1/w[i] is an estimate of the standard deviation of y[i].