Question: How Does SAS Deal With Missing Values?

Is SAS missing 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..

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.

How do you get rid of 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 find missing values in SAS?

To get the FREQ procedure to count missing values, use three tricks:Specify a format for the variables so that the missing values all have one value and the nonmissing values have another value. … Specify the MISSING and MISSPRINT options on the TABLES statement.More items…•

What represents a missing value in a SAS dataset by default )?

By default, SAS replaces a missing numeric value with a period, and a missing character value with a blank when it creates the data set. The following output displays the results.

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.

What is coalesce in SAS?

The COALESCE function checks the value of each column in the order in which they are listed and returns the first nonmissing value. If only one column is listed, the COALESCE function returns the value of that column. If all the values of all arguments are missing, the COALESCE function returns a missing value.

How do I convert character to numeric in SAS?

To convert character values to numeric values, use the INPUT function. new_variable = input(original_variable, informat.); The informat tells SAS how to interpret the data in the original character variable.

How do you include missing values in PROC FREQ?

PROC FREQ DATA=sample ORDER=freq; TABLE State Rank / MISSING; RUN; The ORDER=freq option in the first line of the syntax tells SAS to order the values in the table in descending order. 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 does proc means handle missing values?

Missing ValuesIf a class variable has a missing value for an observation, PROC MEANS excludes that observation from the analysis unless you use the MISSING option in the PROC statement or the CLASS statement.If a BY or an ID variable value is missing, PROC MEANS treats it like any other BY or ID variable value.More items…

How do you sum missing values in SAS?

a=sum(x,y,z); p=x+y+z; run; SUM function returns the sum of non-missing arguments whereas “+” operator returns a missing value if any of the arguments are missing.

What is Call Missing in SAS?

A relatively new call routine in SAS 9.1, CALL MISSING, allows you to set any number of character or numeric variables to a SAS missing value in one call. The syntax of this call routine is as follows: … where arg1, arg2, argn are the names of character or numeric variables.

What does Proc means do in SAS?

One of the most powerful and flexible Procedures you’ll find in the SAS System is PROC MEANS. You can use it to rapidly and efficiently analyze the values of numeric variables and place those analyses either in the Output Window or in a SAS Data Set (or both).