Hi i would take to go from this form:
– x1 x2
y1 a b
y2 c d
to this form. In some kind of automated procces since i have many (many!) rows and coloumns:
y1 x1 a
y1 x2 b
y2 x1 c
y2 x2 d
What is this process called? And can it be done painless in excel? Or should i rather do it in SAS/SPSS/Stata?
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