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Ok. Thanks.

I use EViews 6.

I used the equation series a = @first(p10) + cr_10 and then an error message come and writes @FIRST is not a Genr or series expression function?!

Thank you very much for your help.

Thanks for replying. However, it does not work.
I want to calculate: series a= @first(b)+c.

Hello, how can I get the first not NA value of a series. I want to use this value (series 1) as the starting point of a new series (series 3) and add another one to it (series 2). 1 2 3 NA NA NA NA NA NA NA NA NA 100 0 100 102 3 103 103 4 104 Thank you very much for helping.

Thanks a lot.

Hello, how can I sum series including NAs and finally divide r_Sum by the included available observations in a loop? Here you can see my example: year r1 r2 r3 r_Sum Division by included amount of observations (r_Sum/n_included) 1992 NA NA 0.2 0.2 0.2/1 1993 NA NA -0.4 -0.4 0.1/1 1994 NA 0.4 0.4 0.8...