reverse the fractional differencing series

[metrix]

hi for all,
the fracdiff Add-in can do the fractional coeffitions (coef_frac) and the fractional differencing series (y_frac), after i use the y_frac series to estimate the ARFIMA model next i do forecasting, the result is the fractional fitted series (y_frac_fit).
can you enhance this add-in to use the fitted fractional series (y_frac_fit) and the coeffitions fractional (coef_frac) to get the fitted series.

would you like to help me please it's very important for me.

Best Regards. Metrix

[metrix]

hi for all,
if i have the Y_DIFF_COEFFS and Y_DIFF series how can obtain the Y seriess (the reverse). you understand me!

[metrix]

anyone can help me.