Panel / data management using Lags /xtset

[Chiara Tasselli]

Good Morning everyone !!!

I need to perform the following command:

xtset IDpanel Time
        by IDpanel: replace  Q49_14_TEXT  = Q49_14_TEXT[_n-1] if  Q49_14_TEXT  ==""
        by IDpanel: replace  Q49_14_TEXT  = Q49_14_TEXT[_n+1] if  Q49_14_TEXT == ""

The fact is that until I work whit string variables it works, but when I try with numerical one it doesn't, I had also tried those syntax:

xtset IDpanel Time
        by IDpanel: replace  Q49_14  = Q49_14[_n-1] if  Q49_14  == .
        by IDpanel: replace  Q49_14  = Q49_14[_n+1] if  Q49_14== .

-----------------------------------------------

xtset IDpanel Time
        by IDpanel: replace  Q49_14 = Q49_14_TEXT[_n-1] if  Q49_14 == "."
        by IDpanel: replace  Q49_14  = Q49_14_TEXT[_n+1] if  Q49_14== "."

--------------------------------------------------------------------------

xtset IDpanel Time
        by IDpanel: replace  Q49_14 = Q49_14_TEXT[_n-1] if  Q49_14 ==
        by IDpanel: replace  Q49_14  = Q49_14_TEXT[_n+1] if  Q49_14==

but Stata return to me that error "invalid syntax" or "type mismatch" or "weights not allowed"... Where I fail? Someone could kindly help me?
Thank you so much in advance for your time !!

[Chiara Tasselli]

Sorry solved ... I think I cannot delete it...