topic Using the IN Statement w/ a Continuous Variable in New SAS User

Using the IN Statement w/ a Continuous Variable

_maldini_ — Wed, 25 Jan 2023 20:17:08 GMT

Is there a way to use the IN statement w/ a continuous variable?

With categorical variables, I often subset using the WHERE and IN statements:

Example: WHERE race IN(2,3,4);

In this scenario, the variable "race" is categorical/nominal.

Is there a way to do this with a continuous variable, like age? Age: 0-59

Can you input the values you desire within the parentheses?

Example: WHERE age IN(0:18); or WHERE age IN(0:<19)

Or can you use a format?

Example: WHERE age IN(" ≤ 18 YOA");

Format
Value 
age_fmt
0 - 18 = " ≤ 18 YOA"
19 - 35 = "19 to 25 YOA"
36 to High = "> 35";

Re: Using the IN Statement w/ a Continuous Variable

PaigeMiller — Wed, 25 Jan 2023 20:26:13 GMT

Can you input the values you desire within the parentheses?

Example: WHERE age IN(0:18); or WHERE age IN(0:<19)

The answer is very simple. Try it and see. (Maxim 4)

Is there a way to do this with a continuous variable, like age? Age: 0-59

More generally, you can use

where age<=59;

or if there is a lower limit

where 12 <= age <=59;

Re: Using the IN Statement w/ a Continuous Variable

ballardw — Wed, 25 Jan 2023 21:14:26 GMT

Is your variable truly continuous or a range of INTEGER values?

If your values are integers you can use in (0:18) .

If you compare a numeric variable to a formatted value you better apply the format to the variable such as

if put(age,age_fmt.) in ('<the formatted value>')

otherwise you are comparing a number to text and SAS will attempt to turn one of them into the proper type for the comparison and you will get 1) conversion notes in the log and very likely 2) missing values as they aren't compatible.

Re: Using the IN Statement w/ a Continuous Variable

_maldini_ — Thu, 26 Jan 2023 02:09:49 GMT

Good point about a numeric variable.

I'm a little confused by "if put(age,age_fmt.)..."

Will the "in ('<the formatted value>')" work for a numeric variable, independent of the "if put(age,age_fmt.)"?

Example: WHERE age IN(" ≤ 18 YOA");

Assuming age is numeric (e.g., 21.3 years) and the format " ≤ 18 YOA".

Re: Using the IN Statement w/ a Continuous Variable

SASKiwi — Thu, 26 Jan 2023 03:26:40 GMT

No. If you are using a formatted value comparison you have to apply the format using the PUT function. If you use just a value comparison, you use the actual numeric values stored.

Re: Using the IN Statement w/ a Continuous Variable

Tom — Thu, 26 Jan 2023 03:37:06 GMT

You cannot compare a NUMBER, the actual value of the variable AGE, with a STRING, the text generated by the format attached to the variable AGE.

But you don't have to use PUT(). If the format is attached to the variable you can use VVALUE() instead. But then you cannot use a WHERE statement. So use IF instead.

    1  data test;
    2   set sashelp.class;
    3   where age = 13;
    4  run;

NOTE: There were 3 observations read from the data set SASHELP.CLASS.
      WHERE age=13;
NOTE: The data set WORK.TEST has 3 observations and 5 variables.
NOTE: DATA statement used (Total process time):
      real time           0.00 seconds
      cpu time            0.00 seconds


    5  data test;
    6   set sashelp.class;
    7   if left(vvalue(age)) = '13';
    8  run;

NOTE: There were 19 observations read from the data set SASHELP.CLASS.
NOTE: The data set WORK.TEST has 3 observations and 5 variables.
NOTE: DATA statement used (Total process time):
      real time           0.00 seconds
      cpu time            0.01 seconds