How do you find missing values of all variables in SAS?

How do you find missing values of all variables in SAS?

You can use the PROC FREQ procedure to count the number of missing values per column. You use the statement “table _all_ / missing” to do this for all variables. If you want the count the number of a specific (type) of variable, you can change the _all_ keyword for _character_, _numeric_, or a column name.

How does SAS deal with missing values?

To remove records that have a missing value for a particular character variable, you simply need to use an IF statement to check for blanks, followed by a THEN DELETE statement.

How do you check for nulls in SAS?

The NMISS function returns the number of null and SAS missing numeric values. The NMISS function requires numeric values and works with multiple numeric values, whereas NULL works with only one value that can be either numeric or character.

How do I fix missing data in SAS?

First, we specify the input and (optional) output data set. Then, we use the reponly keyword to only replace missing values. With the method keyword, we let SAS know to replace missing values with the group mean. Finally, with the by statement, we specify how to group the data set.

How do you find missing values in proc?

A simple and quick method to check the number of missing values in a table is to use PROC MEANS with the NMISS option: proc means data = hmeq nmiss; run; Note that only variables with a numeric format can be analyzed with this method.

How do you include missing values in PROC FREQ?

PROC FREQ DATA=sample; TABLE State Rank / MISSING; RUN; The MISSING option appearing after the slash (/) in the TABLE statement tells SAS to include the missing values as a row in the table.

How do I replace missing in zero in SAS?

First, we create an array (num_array) that holds all the numeric columns. Then, we loop over all elements of this array using a do loop. Finally, we use an if-then statement to replace the missing values with a zero.

How do you change variables in SAS?

SAS uses the BESTw. format, where w is the width of the character variable and has a maximum value of 32. You cannot change the type of a variable. You will need to create a new variable from the old variable with the new data type and then drop and rename to keep the original names.

How do you report missing values in a table?

Open the table builder (Analyze menu, Tables, Custom Tables). Right-click Variable with missing values in the table preview on the canvas pane and select Categories and Totals from the pop-up menu. Click (check) Missing Values in the Categories and Totals dialog box, and then click Apply.

How do you check for missing values in SAS?

To use the MISSING function, simply enclose the variable you would like to check for missing values inside the parentheses such as “missing (DeathCause)”. If SAS finds a missing value for the variable specified, it will return a value of 1.

How do you write a blank variable in SAS?

In SAS code, a blank is typically specified by enclosing a space between two quotation marks, such as “ “ or ‘ ‘. With numeric variables, a missing value is denoted with a period.

How do I avoid having to look up the variable type?

To avoid having to look up the variable type before trying to perform an operation on missing values, you can use the MISSING function. The missing function is helpful in this regard because it works the same way for both character and numeric variables. The MISSING function is utilized within SAS Data Step code.

How do you set a variable to a missing value?

Alternatively, if you want to set to a missing value for one or more variable values, you can use the CALL MISSING routine. call missing(sales, name); sets both variable values to a missing value. Note: You can mix character and numeric variables in the CALL MISSING routine argument list.