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Lapis Lazuli | Level 10
data ds;
input values;

How to count and sum positive and negative values 

Jade | Level 19

I don't propose to provide code for you, but here's how I would think about it.


  1. I'd run a DATA step, which reads the data one row at a time
  2. In the data step, I'd keep two running totals, one for the positive and the other for the negative
    1. This means I'd have to compare each incoming VALUES to zero and depending on the result, update the appropriate sum.
    2. It also means that the variable holding the running sums have to be retained over a sequence of rows - i.e. not reset to missing.
  3. And I'd have to detect when I'm processing the last row, so as to output the results.


You can also run something like proc means twice, once on the subset of positive values, and once on the negative subset.


Editted note:  Finally, and most importantly, you can show what you tried (i.e. show us your SAS log), and you'll no doubt get helpful answers.

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

Opal | Level 21


This forum is about SAS users supporting other SAS users.

What's appreciated is if you demonstrate some own effort as else you might end-up with people no more providing answers to your questions.



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