Question: How Do You Find Missing Data In SAS?

How do you remove missing values in SAS?

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.

In this example, we are going to remove all records with a missing value for the DeathCause variable..

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.

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.

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.

How do you enter missing 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 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 the difference between proc means and proc summary?

Proc SUMMARY and Proc MEANS are essentially the same procedure. Both procedures compute descriptive statistics. The main difference concerns the default type of output they produce. Proc MEANS by default produces printed output in the LISTING window or other open destination whereas Proc SUMMARY does not.

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.

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…•

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.

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. … The missing values form a separate BY group.

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.

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.

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.

What is proc means in SAS?

basic data analysisABSTRACT. PROC MEANS is a basic procedure within BASE SAS® used primarily for answering questions about quantities (How much?, What is the average?, What is the total?, etc.) It is the procedure that I use second only to PROC FREQ in both data management and basic data analysis.

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.