How can I do this type of regression?

[art297]

How long before the mead is ready for consumption?

[Linlin]

This is wine from grapes with a little bit honey added. I am going to make mead(only use honey and water) in December.

[PGStats]

You can also get rid of the random access (POINT=) and read the data only once, using arrays :

%let regSize=200;

data rCars(keep=grp engineSize horsepower) / view=rCars;
array es{&regSize} _temporary_;
array hp{&regSize} _temporary_;
set sashelp.cars;
st = 1 + mod(_n_-1, &regSize);
es{st} = engineSize;
hp{st} = horsePower;
if _n_ >= &regSize then do;
     grp = 1 + _n_ - &regSize;
     do i = st+1 to &regSize, 1 to st;
          engineSize = es{i};
          horsePower = hp{i};
          output;
          end;
     end;
run;

proc reg data=rCars outest=eCars;
by grp;
model horsePower = enginesize;
run;

PG

[1zmm]

Search using Google for "rolling window regression" in SAS:

    http://www.sas-programming.com/2011/08/rolling-analysis-of-time-series.html.

    http://www.nesug.org/proceedings/nesug07/sa/sa04.pdf