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eduard1231
Fluorite | Level 6

This is the sample code 

 

data a_k resid;
set akkk;
if mad_command ne 0 then do; output resid and ....; end;
run;

 

So, what I am trying to do is that if mad_command ne 0, then ouput the whole row to resid table AND ALSO OUTPUT the previous row to resid table as well. 

 

Thanks

1 ACCEPTED SOLUTION

Accepted Solutions
mkeintz
PROC Star

This is where using the POINT= option of the SET statement helps:

 

data a_k resid;
  set akkk;
  output a_k;

  if mad_command ne 0 then do; 
    output resid;
    p=_n_-1;
    set akkk point=p;
    output resid;
  end;
run;

This program outputs every akkk record to dataset a_k.  If outputs the selected record, and its predecessor to resid.  Note the original preceding record now follows the precipitating record.  If instead you want to preserve the original order, you can:

 

data a_k resid;
  set akkk;
  output a_k;

  if mad_command ne 0 then do p=_n_-1 to _n_;
    set akkk point=p;
    output resid;
  end;
run;
--------------------------
The hash OUTPUT method will overwrite a SAS data set, but not append. That can be costly. Consider voting for Add a HASH object method which would append a hash object to an existing SAS data set

Would enabling PROC SORT to simultaneously output multiple datasets be useful? Then vote for
Allow PROC SORT to output multiple datasets

--------------------------

View solution in original post

2 REPLIES 2
novinosrin
Tourmaline | Level 20

Hello @eduard1231 

 

Are you asking for this kinda logic?

 


data have;
input var ;
cards;
0
0
4
1
2
;


data want;
set have;
if var ne 0 then do;
output;
n=_n_-1;
set have point=n;
output;
end;
run;
mkeintz
PROC Star

This is where using the POINT= option of the SET statement helps:

 

data a_k resid;
  set akkk;
  output a_k;

  if mad_command ne 0 then do; 
    output resid;
    p=_n_-1;
    set akkk point=p;
    output resid;
  end;
run;

This program outputs every akkk record to dataset a_k.  If outputs the selected record, and its predecessor to resid.  Note the original preceding record now follows the precipitating record.  If instead you want to preserve the original order, you can:

 

data a_k resid;
  set akkk;
  output a_k;

  if mad_command ne 0 then do p=_n_-1 to _n_;
    set akkk point=p;
    output resid;
  end;
run;
--------------------------
The hash OUTPUT method will overwrite a SAS data set, but not append. That can be costly. Consider voting for Add a HASH object method which would append a hash object to an existing SAS data set

Would enabling PROC SORT to simultaneously output multiple datasets be useful? Then vote for
Allow PROC SORT to output multiple datasets

--------------------------

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