Code: proc report data=deposits nowd; column cust_id amount_deposited     amount_deposited=deposit_count amount_withdrawn    amount_withdrawn=withdraw_count avg_dep_amt    avg_tran_count     avg_wdraw_count; define cust_id/ group; define amount_deposited / analysis sum noprint; define amount_withdrawn / analysis sum noprint; define deposit_count/ analysis n noprint; define withdraw_count/ analysis n noprint; define avg_dep_amt / computed 'avg. deposit amount'; define avg_tran_count / computed 'avg. no. of transactions'; define avg_wdraw_count / computed 'avg. no. of withdrawals'; compute avg_dep_amt; avg_dep_amt = amount_deposited/deposit_count; endcomp; compute avg_tran_count; avg_tran_count = (deposit_count + withdraw_count)/3;  /* there is a reason to divide by 3 */ endcomp; compute avg_wdraw_count; avg_wdraw_count = withdraw_count/3;   /* there is a reason to divide by 3 */ endcomp; run;   Log: NOTE: Variable amount_deposited is uninitialized. NOTE: Missing values were generated as a result of performing an operation on missing values. Each place is given by: (Number of times) at (Line):(Column). 5 at 1:32 I can compute count the number of non-missing values of variable amount_deposited using alias, but I cannot compute sum of those values, log shows me that the variable is not initialized. What is the problem in SAS? ... View more