As a neophyte, I am trying to find out what the codes, given below, are trying to achieve. I would appreciate if you could explain the following codes in plain English. Thanks.
Note: I understand the first set of codes, which basically get the data.
proc sql noprint;
create table rates as
select date, days, rate
from optionm.zerocd;
quit;
proc expand data=rates out=rates_expanded from=daily;
by date;
id days;
convert rate;
run;
data RiskFree;
set rates_expanded;
by date;
if FIRST.date then do;
do days = 1 to days;
output;
end;
end;
else output;
run;
might be better to ask the person who gave you the code
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