method
Polynomial.truncate(self, size)
[source]
Truncate series to length size
.
Reduce the series to length size
by discarding the high degree terms. The value of size
must be a positive integer. This can be useful in least squares where the coefficients of the high degree terms may be very small.
Parameters: 


Returns: 

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https://docs.scipy.org/doc/numpy1.17.0/reference/generated/numpy.polynomial.polynomial.Polynomial.truncate.html