SAS code help urgent!

[NEEDSASHELP]

Hi Everyone,

I have encountered a few problems on my data set and was wondering if anyone here may be able to help out by showing me or providing hints on the codes I need to run the following things.:

1). If I have 2 columns of data, with say 10000 but specifically want to regress between row 5000 to say 5899, what is the code for this?

         proc reg

         data = regresstest.dat;

         model RE_RF = RM_RF - (what to I put here so I control which dates I include in the regression)

     I will need to regress like this many times, so I really need a code to do this, and the regress the same variables with different rows of data included (each rows being a time period of course).

2). I have a dataset, where lets say there is 6 rows - 2 columns:

  Date             volume bought

20051221          5

20051221          3

20051222          8

20051222          9

20051224          5

20051225          4

There are 2 rows for the date 20051221 - Is there a code so that in any repeating dates - the corresponding (volume bought) is the sum of the volume bought on the ows with all the same dates?

Also there is no value for 20051223 - Is there a code to autofill a date 20051223 - and the put volume bought as 0. (My data set will have 1000s of rows so I can't do this manually.

Essentially I want the example above to look like this:

Date          Volume bought

20051221      (5+3)

20051222      (8+9)

20051223      0

20051224      5

20051225      4

3). Lastly, if I had multiple data sets but each dataset and I want to SUM - Say dataset 1 - ROW 20 to 40, column 3, with dataset 1 - row 50 to 70 colume 3 with dataset 2, and so on, then I want the output in a new data file. Is there a code to achieve this.

THANK YOU SO MUCH FOR YOUR TIME - THANKS IN ADVANCE - I would appreciate it if you are able to help me out. THANK YOU EVERYONE AGAIN IN ADVANCE - I am in pretty desparate need for codes to do something like this.

[art297]

I didn't read your entire post, just the part about only including certain records in a given analyses.

You could incorporate firstobs and obs into your code.  It works the same for procs as it does for a datastep.

Thus, given sashelp.class, if you want the 3rd record and the four records that come after it, you could use:

%let start=3;

%let end=%eval(&start.+4);

data want;

  set sashelp.class (firstobs=&start. obs=&end.);

run;

[FriedEgg]

data have;

format hold_date date date9.;

input date mmddyy10. v_bought;

retain hold_date rownum;

  if _n_=1 then do; hold_date=date; rownum=1; end;

  if hold_date ne date and hold_date ne date+1 then do;

   output;

     rownum=rownum+1; date=hold_date+1; v_bought=0;

   output;

  end;

  else output;

  rownum=rownum+1;

  hold_date=date;

keep date v_bought rownum;

cards;

05/01/2005          7

05/01/2005          2

05/01/2005          8

05/01/2005          1

05/01/2005          7

05/03/2005          6

05/03/2005          2

05/03/2005          4

05/03/2005          1

05/05/2005          4

05/05/2005          8

05/05/2005          8

05/05/2005          8

05/07/2005          8

05/07/2005          7

05/07/2005          5

05/07/2005          7

05/09/2005          9

05/09/2005          2

05/09/2005          2

05/09/2005          3

05/11/2005          4

05/11/2005          8

05/11/2005          1

05/11/2005          6

;

run;

proc sql;

create table want as

select date, sum(v_bought) as v_total

   from have

  group by date

  order by date;

quit;

proc reg data=have(where=(10<=rownum<=25));

model date=v_bought;

run;

data have_more;

format hold_date date date9.;

input date mmddyy10. v_bought;

retain hold_date rownum;

  if _n_=1 then do; hold_date=date; rownum=1; end;

  if hold_date ne date and hold_date ne date+1 then do;

   output;

     rownum=rownum+1; date=hold_date+1; v_bought=0;

   output;

  end;

  else output;

  rownum=rownum+1;

  hold_date=date;

keep date v_bought rownum;

cards;

05/12/2005          7

05/12/2005          5

05/12/2005          8

05/12/2005          6

05/12/2005          5

05/12/2005          9

05/12/2005          7

05/13/2005          5

05/13/2005          1

05/13/2005          6

05/13/2005          6

05/13/2005          5

05/13/2005          7

05/13/2005          4

05/15/2005          8

05/15/2005          5

05/15/2005          3

;

run;

proc sql;

create table want_more as

select date, sum(v_bought) as v_total

   from ( select date, v_bought

            from have

                       where 1<=rownum<=35

                       union

                      select date, v_bought

                        from have_more

           where 1<=rownum<=20 )

  group by date

  order by date;

quit;

[Ksharp]

For 1) in your reg model ,there are  RE_RF  RM_RF , but in your data posted not include these two variable.

For 2)

For3) You 'd better post some sample data and output you want to be.

data temp;
input date : yymmdd10. volumn;
format date yymmddn8.;
cards;
20051221          5
20051221          3
20051222          8
20051222          9
20051224          5
20051225          4
;
run;
proc sort data=temp;
 by date;
run;
data want(keep=_date sum);
 set temp;
 by date;
 pre_date=lag(date);
 if date-pre_date gt 1 then do;
                               do i=pre_date+1 to date-1;
                                  _date=i;sum=0;output;
                               end;
                             end;
 if first.date then sum=0;
 sum+volumn;
 if last.date then do;_date=date;output;end;
 format _date yymmddn8.;
run;

Ksharp