Answer / vivek

PROC SUMMARY displays the descriptive statistics. By
default, PROC SUMMARY produces no display output, but PROC
MEANS does produce display output. So in Proc SUMMARY you
have to give the Print option explicitly.

Also if you exclude Var statement then summary will only
print number of obs. Try this on sashelp.shoes

proc means data = sashelp.shoes;
run;

proc summary data = sashelp.shoes print;
run;

Answer / emw

I began using SAS in the early 1980's, and Proc Summary was thought to be one of the proc's to be no longer supported by SAS, so many programmer stopped using it! One of the advantages of Proc Summary was it didn't error out if the data set was not sorted, as proc means did. Proc Summary did an internal check, now we can check but in the old days this option wasn't possible. These days, I just use Proc Means don't know why Proc Summary is still being used ...anyone??

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/* This is example of age caluculate wihtout to display perfect days and years in output window */ data age; retain dob "12jun2003"d now "24may2011"d; age1=now-dob; age=(now-dob)/365.25; years=int(age); days1=round((age-years)*365.25); months=month(now)-1; if days1 gt 30 and months in(12,10,8,6,4,2)then do; month1=days1/30.4375; month=int(days1/30.4375); if day(now)=1 then days=1; else days=round((month1-month)*30.4375)+1; drop days1 month1 month; end; else if days1 gt 30 and months in (1,3,5,7,9,11)then do; month1=days1/30.4375; month=int(days1/30.4375); if day(now)=1 then days=1; else days=round((month1-month) *30.4375); drop days1 month1 month; end; drop age age1; proc print data=age; format dob now date.; run;

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what are the differences between proc report and proc tabulate?

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