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# numpy.polynomial.chebyshev.Chebyshev.truncate

`Chebyshev.``truncate`(size)

  Truncate series to length size.

  Reduce the Chebyshev 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 : | size : positive int The series is reduced to length size by discarding the high degree terms. The value of size must be a positive integer.
  Returns : | new_instance : Chebyshev New instance of Chebyshev with truncated coefficients.