How do you drop a range of a variable in SAS?
The easiest and safest way to drop variables from a SAS data set is with PROC SQL. Just list the variables by name, separated by a comma: proc sql; alter table MYSASDATA drop name, age, address; quit; Altering the table with PROC SQL removes the variables from the data set in place.
How do you select all numeric variables in SAS?
6 easy ways to specify a list of variables in SAS
- Use the _NUMERIC_, _CHARACTER_, and _ALL_ keywords to specify variables of a certain type (numeric or character) or all types.
- Use a single hyphen (-) to specify a range of variables that have a common prefix and a sequential set of numerical suffixes.
How do you reference a variable in SAS?
After a macro variable is created, you typically use the variable by referencing it with an ampersand preceding its name (&variable-name), which is called a macro variable reference. These references perform symbolic substitutions when they resolve to their value. You can use these references anywhere in a SAS program.
What are _numeric_ and _character_ in SAS?
SAS has three specially named variable lists: _numeric_ , _character_ and _all_ , respectively. They refer to numeric, chararacter or all variables in a data step. Apparently, _character_ can be abbreviated with _char_ .
How do you rename multiple variables in SAS?
Rename Multiple Variables You can use the RENAME option also to change the name of multiple variables (at once). The RENAME option is a dataset option that you can use in the DATA statement and SET statement. You write the old variable names followed by an equal sign and the new variable names, all between parenthesis.
How do you set variables in SAS?
Ways to Create Variables
- Create a New Variable Using the LENGTH Statement.
- Create a New Variable Using the ATTRIB Statement.
- Create a New Variable Using an Assignment Statement.
- Reading Data with the INPUT Statement in a DATA Step.
- Create a New Variable Using the FORMAT or INFORMAT Statements.
What is Substr in SAS?
INTRODUCTION. The SAS data step function SUBSTR (commonly pronounced “sub- string”) function is used to work with a specific position or positions of characters within a defined character variable. The function focuses on a portion of a string and can go on either side of the “=” sign in a data step statement.
What is a SAS variable?
SAS Variable is a name given by the user to any column of a dataset. The basic motive behind this is to categorize all observations under a particular characteristic like height, weight, name, date of birth and so on. Any name came to be given to a variable depending upon the characteristic, it has to represent.
How do I fix missing data in SAS?
First, we create an array (num_array) that holds all the numeric columns. Then, we loop over all elements of this array using a do loop. Finally, we use an if-then statement to replace the missing values with a zero. /* REPLACE WITH 0 – USING ARRAY */ data work.
How do I create new variable in SAS?
In a DATA step, you can create a new variable and assign it a value by using it for the first time on the left side of an assignment statement. SAS determines the length of a variable from its first occurrence in the DATA step. The new variable gets the same type and length as the expression on the right side of the assignment statement.
What is variable in SAS?
In the SAS, a variable is a name given by the user to the column of a dataset. The purpose behind variables in SAS is, to categorize observations under a particular characteristic like name, date of birth, height, weight, etc. A variable name can be given on the basis of characteristics, which it has to represent.
What is the length of variable in SAS?
What is the Default Length of a Variable When you create a new dataset, SAS reserves by default a length of 8 bytes to store information for each variable. For numeric variables, 8 bytes is enough to save integers up to 16 digits.
What is the function of SAS?
The United States Social Security Administration (SSA) is an independent government agency that administers social programs. Its main function is to administer Social Security, a government program providing for the economic welfare of the individual through payments to people who are retired, unemployed, or unable to work.