How Does Proc Means Handle Missing Values?

How do you include missing values in proc means?

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 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 .

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.

What does VAR mean in SAS?

Identifies the analysis variables and their order in the output. Default: If you omit the VAR statement, PROC MEANS analyzes all numeric variables that are not listed in the other statements. When all variables are character variables, PROC MEANS produces a simple count of observations.

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 is Nmiss in SAS?

SAS provides several functions to test for missing values but in this post we will focus on MISSING(), CMISS() and NMISS() functions. The NMISS() function is reserved for numeric variables. … MISSING function works for either character or numeric variables and it also checks for the special numeric missing values (.

Does Proc means ignore missing values?

PROC MEANS excludes missing values for the analysis variables before calculating statistics. … If a FREQ variable value is missing or nonpositive, PROC MEANS excludes the observation from the analysis. If a WEIGHT variable value is missing, PROC MEANS excludes the observation from the analysis.

Is SAS missing data step?

The MISSING statement usually appears within a DATA step, but it is global in scope. The MISSING= system option allows you to specify a character to be printed when numeric variables contain ordinary missing values (.).

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 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 function can be used to calculate the number of missing values in each variable?

The first thing we are going to look at the variables that have a lot of missing values. For numerical variables, we use proc means with the options n and nmiss. For character variables, we can use proc freq to display the number of missing values in each 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.

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.

How do you remove missing values in Excel?

On the Home tab, in the Editing group, click Find & Select.Click Go To Special.Select Blanks and click OK.Excel selects the blank cells.On the Home tab, in the Cells group, click Delete.Click Delete Sheet Rows.Result: