I used proc append to add observations from one sas data set to the end of another sas data set. However, I noticed the size of new dataset is much bigger than the sum of three adding data sets. I thought the size should be around the sum of three. Is there something wrong with the code?
data d.rat15to17; set d.rat15; run; proc append base=d.rat15to17 data=d.rat16; run; proc append base=d.srat15to17 data=d.rat17; run;