topic Re: Recoding a NULL response value to a value of 0 in SAS Programming

Recoding a NULL response value to a value of 0

Bluekeys49 — Tue, 07 Jul 2020 00:45:46 GMT

I have 50 survey variables, named AB1, AB2, AB3,...,AB50. Most of these variables contain a survey response, either answer choice A, B, or C. In some cases, there is no response in which the field has NULL entered in the cell. How do I change all of these NULL responses to a 0 without doing an if/then statement for each individual variable? Thanks for any help!

Re: Recoding a NULL response value to a value of 0

ketpt42 — Tue, 07 Jul 2020 01:27:15 GMT

data want;
    set have;
    array abvar{*} $ AB1-AB50;
    do i = 1 to dim(abvar);
        if missing(abvar(i)) then abvar(i) = '0';
    end; 
    drop i;
run;

Re: Recoding a NULL response value to a value of 0

Patrick — Tue, 07 Jul 2020 01:25:10 GMT

~~If you need this only for display purposes then you can also use:~~

~~options missing='0';~~

Only works for numerical variables.

Re: Recoding a NULL response value to a value of 0

Bluekeys49 — Tue, 07 Jul 2020 01:14:49 GMT

I neglected to mention that this survey is being imported in from Excel. The questions that were skipped (no response) were automatically populated with the word NULL when imported into SAS for analysis. So, wanting to change all occurrences of this text NULL value globally to 0 in any response field it exists.

Re: Recoding a NULL response value to a value of 0

sustagens — Tue, 07 Jul 2020 01:18:51 GMT

If variables are character, zero should be quoted

Re: Recoding a NULL response value to a value of 0

sustagens — Tue, 07 Jul 2020 01:21:20 GMT

Change @ketpt42's code above to

if abvar(i)='NULL' then abvar(i) = '0';