Question: Is Missing Function In SAS?

How do you remove duplicate observations in SAS?

The Sort Procedure with the NODUPKEY option is the simplest and most common way of removing duplicate values in SAS.

Simply specify the NODUPKEY option in the PROC SORT statement.

In the BY statement, specify the variables by which you want to remove duplicates..

Which SAS function can be used to detect missing values in a variable?

function cmissNumber of missing values in each observation For example, we can use SAS function cmiss to store the number of missing values from both numeric and character variables in each observation.

How do you replace missing values with 0 in SAS?

proc stdize data=Miss_Values out=ProcStdizeMethod reponly missing=0; run; By default, PROC STDIZE standardizes the input data by some location and scale parameter. However, we can suppress the standardization with the REPONLY Option. This option ensures that we are only to replace missing values and nothing else.

How do you remove missing values in SAS?

If you want to remove ALL Rows with ANY missing values, then you can use NMISS/CMISS functions. data want; set have; if nmiss(of _numeric_) + cmiss(of _character_) > 0 then delete; run; for all char+numeric variables.

How do you replace missing values 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.

What is .Z in SAS?

Z is a special missing value. In SAS a missing value (what you might call a NULL value) is indicated by a period. … The missing values are distinct and are all considered smaller than any actual number. . Z is the “largest”. So PTYPE{I}<=.

What does variable uninitialized mean in SAS?

The “NOTE: Variable X is uninitialized” message is a result of trying to run a DATA Step which utilizes a variable that is not present in the input dataset or has not been created at the point within the DATA Step where SAS tries to utilize the variable.

What is coalesce in SAS?

The COALESCE function is used to select the first non-missing value in a list of variables. In other words, it returns the first non-blank value of each row. Let’s create a sample dataset in SAS to understand COALESCE function.

How does SAS deal with missing values?

Numeric missing values are represented by a single period (.). Character missing values are represented by a single blank enclosed in quotes (‘ ‘). Special numeric missing values are represented by a single period followed by a single letter or an underscore (for example .

Is missing in SAS Data step?

The MISSING function enables you to check for either a character or numeric missing value, as in: if missing(var) then do; In each case, SAS checks whether the value of the variable in the current observation satisfies the condition specified. If it does, SAS executes the DO group.

What is Call Missing in SAS?

The CALL MISSING routine assigns an ordinary numeric missing value (.) to each numeric variable in the argument list. The CALL MISSING routine assigns a character missing value (a blank) to each character variable in the argument list. … You can mix character and numeric variables in the argument list.

Does Proc mean missing values?

PROC MEANS excludes missing values for the analysis variables before calculating statistics. Each analysis variable is treated individually; a missing value for an observation in one variable does not affect the calculations for other variables.

How do I merge in SAS?

To perform a one-to-one merge, use the MERGE statement without a BY statement. SAS combines the first observation from all data sets that are named in the MERGE statement into the first observation in the new data set, the second observation from all data sets into the second observation in the new data set, and so on.