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Great thanks...
I will rebuild the series first using log of all original variables and second do the HP against log(IPI) to get the IPI_Gap (cycles series).
and se the difference with IPI_Gap of original IPI.
Here you have the data attached.
thanks for your help Nadja.

Hi nadja, thanks a lot! it works! now i have 3 series in the window , hptrend01, my IPI series and finaly the IPI_GAP (as i specified in the "cycle series"). You are the best. In fact i am trying to regress a african central bank rate decisionagainst inflation, outpu gap, and other explant...

Dear Nadja, I would thank you a lot for your help. I also understand Gareth's point. in fact I have the industrial production index (IPI) as a proxy of GDP. Dear nadja, I tried HP filter and obtained a trend, should I consider these series as output gap? With the IPI, I did the following to get the ...

Thanks a lot Pamela.
Regards

Hi all,
Could you please show me how to get output gap from GDP data?
i genr log(GDP) but struggling to get get output gap.
could you please show the right equation to write?
Thanks

hope you are well. I am doing a research and Eviews beginner .. could someone please help me finding how to plot data as month instead of year on my graph?

Regards