topic Re: Value lookup while reading in CSV in data step in SAS Programming

Value lookup while reading in CSV in data step

_SAS_ — Sun, 11 Sep 2016 14:18:27 GMT

Hi all,

Is it possible while reading in some CSVs in a data step with infile, to perform also some kind of lookup mapping against some other tables which were already previously created to calculate some aditional columns on the fly?

For example, let's assume I read in a CSV which contains two columns, entity and currency. I need to calculate a 3rd column, reporting_currency which is obtained by looking up the entity-currency tuple in another table I already have imported.

Thank you for the help!

Re: Value lookup while reading in CSV in data step

Shmuel — Sun, 11 Sep 2016 15:40:23 GMT

You can use PROC FORMAT to create a format from the lookup table.

Then you can add lines like:

new_var = put(old_var, format_name.);

where format_name is the name you gave in 1st step.

Pay attention to the dot at end of format name.

Re: Value lookup while reading in CSV in data step

BrunoMueller — Sun, 11 Sep 2016 19:31:50 GMT

Have a look at this paper Table Lookup Techniques : From the Basics to the Innovative by Art Carpenter it gives a good overview of different techniques. The type of method to choose is also dependant on the amount of data. Have a look at the first example using a hash object.

Bruno