Shulou(Shulou.com)06/03 Report--

What this article shares with you is about what the missing function is. The editor thinks it is very practical, so I share it with you to learn. I hope you can get something after reading this article. Let's take a look at it with the editor.

The missing () function is a function used to test missing values.

There is an example in the help documentation that checks for variables that contain missing values:

Data _ null_; input @ 1 var1 3. @ 5 var2 3; if missing (var1) then do; put 'Variable 1 is Missing.'; end; else if missing (var2) then do; put' Variable 2 is Missing.'; end; datalines;127988 195

In addition, we often encounter situations where missing values need to be eliminated, and we are usually used to using if variable=. The statement then delete; is prone to error in many cases.

For example:

Data value; input var1 var2 @ @; if var2=. Then delete; datalines;127 988 195. 122. N; run

If var2=. Results such as then delete will only eliminate missing values. The results obtained are:

Obs var1 var2

1 127 988

2 122 N

If we need to eliminate .n, we can consider the missing () function:

Data value; input var1 var2 @ @; if missing (var2) then delete; datalines;127 988 195. 122. N; run;proc print; run

Results:

Obs var1 var2

1 127 988

The above is what the missing function is, and the editor believes that there are some knowledge points that we may see or use in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.