What Is Nmiss In SAS?

What is proc means in SAS?


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.).

How do you transpose data in SAS?

The general format of PROC TRANSPOSE is: PROC TRANSPOSE DATA=Dataset-name OUT=New-dataset-name; BY variable(s); COPY variable(s); ID variable; VAR variable(s); RUN; In the SAS code above: The PROC TRANSPOSE statement tells SAS to execute the transpose procedure on an existing dataset called Dataset-name .

Is missing function in SAS?

The MISSING function checks a numeric or character expression for a missing value, and returns a numeric result. If the argument does not contain a missing value, SAS returns a value of 0. If the argument contains a missing value, SAS returns a value of 1.

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…

What is being created in Proc step?

The PROC step consists of a group of SAS statements that call and execute a procedure, usually with a SAS data set as input. Use PROCs to analyze the data in a SAS data set, produce formatted reports or other results, or provide ways to manage SAS files.

How do I delete missing observations 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.

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 delete a row in SAS?

To delete some or all of the rows in a table, use the DELETE statement. When the statement is successfully executed, the SAS log shows a message that indicates the number of rows that have been deleted. WHERE is optionally used to specify an expression that subsets the rows to be deleted.

What is Proc Freq?

The PROC FREQ is one of the most frequently used SAS procedures which helps to summarize categorical variable. It calculates count/frequency and cumulative frequency of categories of a categorical variable. … It also produces bar charts and tests for association between two categorical variables.

What is Cmiss SAS?

The CMISS() function introduced in SAS 9.2 is similar to the NMISS() function that it counts the number arguments that are missing, but for both character and numeric variables without requiring character values to be converted to numeric.

How do you find missing data 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…•

How does SAS deal with missing values?

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. In SAS code, the period [.] is specified by simply using the period with no quotation marks or parentheses around it.