Dear All, I would really appreciate if someone can help me with the following issues: I have a data set with a response variable and about 40 predictor variables. I am trying to extract the response as well as soem other predictor values for which a specific predictor is missing. How do I code it? I have two data sets each with response and predictor variables (number of predictors is not same in both data). If I want to combine the two data as below what do I do? Data 1: y1, x11, x21, x31, z Data 2: y2, x12,x22,x32,x42,z PS: z stands for predictor with same values for response in both dataset Thanks
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