Hello,

This is part of my dataset.

What I want to do is to append contri_dia2 contri_dia3 contri_dia4 contri_dia5 under contri_dia1, so that I could get a new variable contri_dia (the final dataset is expected to be 2 colunms: lopnr and contri_dia).

As id (in my case "lopnr") is not unique identifier in my dataset, so I can't use reshape...

Could anyone help me with this question? Thank you in advance!

Best,
Z

Code:
* Example generated by -dataex-. To install: ssc install dataex
clear
input long lopnr str6 contri_dia1 str7 contri_dia2 str6(contri_dia3 contri_dia4 contri_dia5)
13982 "Z090" ""      ""      ""     ""    
13982 "Z223" "U801"  "I702C" "L899" "Z518"
13982 ""     ""      ""      ""     ""    
13982 ""     ""      ""      ""     ""    
14294 ""     ""      ""      ""     ""    
14332 ""     ""      ""      ""     ""    
15454 ""     ""      ""      ""     ""    
15880 "M350" "J459"  "E782"  ""     ""    
15880 "I109" "E785"  ""      ""     ""    
15893 ""     ""      ""      ""     ""    
16223 ""     ""      ""      ""     ""    
17510 ""     ""      ""      ""     ""    
18222 "B028" "E114D" "I501"  ""     ""    
18517 ""     ""      ""      ""     ""    
18517 ""     ""      ""      ""     ""    
18517 "E039" "L940"  ""      ""     ""    
18517 ""     ""      ""      ""     ""    
18517 ""     ""      ""      ""     ""    
18517 ""     ""      ""      ""     ""    
19279 "E869" "N390"  "B962"  "M819" "I109"
19279 "F001" "N178"  "E869"  "E869" "M819"
20180 ""     ""      ""      ""     ""    
20383 ""     ""      ""      ""     ""    
20728 ""     ""      ""      ""     ""    
20759 ""     ""      ""      ""     ""    
21306 "I109" ""      ""      ""     ""    
21306 "T818" "I109"  ""      ""     ""    
21306 "I159" ""      ""      ""     ""    
21306 "I109" "E785"  ""      ""     ""    
21306 "I109" "E785"  ""      ""     ""    
21306 "I109" "E785"  ""      ""     ""    
21306 "I109" "E785"  ""      ""     ""    
21306 "G834" "E119"  "I109"  ""     ""    
21306 "I109" ""      ""      ""     ""    
21306 "Z038" "I109"  "E118"  ""     ""    
21306 "E119" ""      ""      ""     ""    
21306 "I109" "I340"  "E119"  ""     ""    
21306 "I340" "E119"  ""      ""     ""    
21306 "I109" "E119"  ""      ""     ""    
21682 ""     ""      ""      ""     ""    
21682 "I109" "E785"  "I652"  "E119" "G819"
21682 "I109" ""      ""      ""     ""    
21682 ""     ""      ""      ""     ""    
21682 "I714" "Z866A" ""      ""     ""    
21682 "I714" "Z866A" ""      ""     ""    
21952 ""     ""      ""      ""     ""    
22103 ""     ""      ""      ""     ""    
22113 "I209" "E108"  "E669"  ""     ""    
22113 ""     ""      ""      ""     ""    
22113 "I252" "E109"  "I209"  ""     ""    
22113 "E119" "N390X" "I259"  ""     ""    
end