How to create a new variable in spss
What is string variable?
String variables, simply speaking, are variables that contain not just numbers, but also other characters (possibly mixed with numbers). For instance, the European Social Survey stores information about the country where respondents were surveyed in variable cntry , which contains strings like “DE”, “ES, “LT” etc.
How do I create a new variable in R?
To create a new variable or to transform an old variable into a new one, usually, is a simple task in R. The common function to use is newvariable <- oldvariable . Variables are always added horizontally in a data frame.
How do I create a new variable in Dplyr?
To create the new variable, we start with the data frame with the pipe operator and use mutate() function. Inside mutate() function, we specify the name of the new variable we are creating and how exactly we are creating.
How do you add two variables in R?
For example, to add two numeric variables called q2a_1 and q2b_1 , select Insert > New R > Numeric Variable (top of the screen), paste in the code q2a_1 + q2b_1 , and click CALCULATE. That will create a numeric variable that, for each observation, contains the sum values of the two variables.
How do I rename a variable in R studio?
How do I rename a variable in Dplyr?
To rename a column in R you can use the rename() function from dplyr. For example, if you want to rename the column “A” to “B”, again, you can run the following code: rename(dataframe, B = A) .
How do I change all variables in the same name in R?
You can rename all instances of a variable name by highlighting one instance of the variable name and then using Code > Rename in Scope .
How do I rename a variable in SAS?
You rename a SAS variable with the RENAME option. The RENAME option is a data set option which enables you to change the name of a variable. First of all, you define the old variable name, then an equal sign, and finally the new variable name. You can rename one or more variables with one RENAME option.
How do you rename a variable in SAS with spaces?
The options validvarname=any; tells SAS to allow you to have variable name begin with or contain spaces, special characters or numbers. Additionally, we need to put variable name having spaces in quotes followed by the letter n. Q.
How do I change the order of variables in SAS?
When you have existing data in SAS and want to change the order of the variables, use the retain statement. Suppose you have a data set mydata with variables in the order of e c a b d .
Where in SAS is data step?
The WHERE statement can only be used in DATA steps that use existing SAS data set(s) as input, i.e., a SET, MERGE, or UPDATE statement must exist. If you are using an INPUT statement to read in “raw” files, then you cannot use WHERE. A single WHERE statement can apply to multiple data sets.
How do I filter multiple values in SAS?
You can filter on multiple values only using the In and Not in operators. Enter multiple values by pressing the Enter key after each value, or click Browse. If you choose the Match operator or the Not match operator, then the value that you enter must be surrounded by leading and trailing forward slashes (/).
What is the difference between if and where in SAS?
WHERE statement applies the subset condition before merging the data sets, Whereas, IF statement applies the subset condition after merging the data sets.
What is PDV in SAS?
What is the PDV? The Program Data Vector is a logical area of memory. that is created during the data step processing. SAS builds a SAS dataset by reading one observation at. a time into the PDV and, unless given code to do otherwise, writes the observation to a target dataset.
How do you test for missing values in SAS?
Check for missing numeric values
If x <=. z then PUT “x is missing“; The MISSING function accepts either a character or numeric variable as the argument and returns the value 1 if the argument contains a missing value or zero otherwise.
Can we use where statements to subset records when reading raw data?
Since either the WHERE or IF statement could have been used, using the WHERE statement would be more efficient. To save processing time, you can subset the data as you are reading the records while creating the EXAM data set.
How do I create a new variable 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.
- Using the IN= Data Set Option.
How do you subset variables in SAS?
Subsetting a SAS data set means extracting a part of the data set by selecting a fewer number of variables or fewer number of observations or both. While subsetting of variables is done by using KEEP and DROP statement, the sub setting of observations is done using DELETE statement.
How do I extract data from a Dataframe in R?
Extract data frame cell value
- Extract value of a single cell: df_name[x, y] , where x is the row number and y is the column number of a data frame called df_name .
- Extract the entire row: df_name[x, ] , where x is the row number.
- Extract the entire column: df_name[, y] where y is the column number.