Hallo to everyone.
I have this problem. I have a big data set so this i will try to explain you it was difficult to be implemented by hand.
First of all i have one data set which looks like:
qq1 qq2 qq3 qq4
1
0
0
2
11
i want to pick up all the variables in one new column
like
qq
1
0
0
2
11
from the first table if one column value is not missing means that all the other columns are missing in the same row
thank you in advance