trim(self, tol=0)
Remove trailing coefficients until a coefficient is reached whose absolute value greater than :None:None:`tol` or the beginning of the series is reached. If all the coefficients would be removed the series is set to [0]
. A new series instance is returned with the new coefficients. The current instance remains unchanged.
All trailing coefficients less than :None:None:`tol` will be removed.
New instance of series with trimmed coefficients.
Remove trailing coefficients
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