How do I add days to a date in SPSS?

Please go to the Help – Topics window in SPSS, click on the Topics tab, and enter “Date increments” in the search field. Look for the “Date Increments” topic and you will find more information regarding the DATESUM function.

What is a date variable?

Date variables are numeric variables in SPSS, and as such, they can be added, subtracted, etc. Specifically, date variables in SPSS are the number of seconds since the beginning of the Gregorian calendar, which was October 14, 1582. Let’s look at an example data set below.

How do I convert a string variable to a date in SPSS?

SPSS String to Date Syntax

1. *1. Create mini dataset. data list free/s1 s2(2a20). begin data.
2. *2. Extract day, month and year from string. compute day = number(char. substr(s1,char.
3. *3. Compute date variable. compute d1 = date. dmy(day,month,year).
4. *4. Display as date. formats d1(adate10).

Can you add variables in SPSS?

Add Variables merges the active dataset with another open dataset or external IBM® SPSS® Statistics data file that contains the same cases (rows) but different variables (columns). If you are not matching cases based on the values of key variables, file order determines how cases are matched. …

How to create date and time variables in SPSS?

Using the Date & Time Wizard 1 Click Transform > Date and Time Wizard. 2 Select Create a date/time variable from a string containing a date or time. Then click Next. 3 In the Variables box, select variable enrolldate. 4 In the Result Variable box, enter a name for the new date variable; let’s call it date_of_enrollment. 5 Click Finish.

How to change the name of a variable in SPSS?

Using the Compute Variables Dialog Window 1 Click Transform > Compute Variables. 2 In the Target Variable box, give the variable a new name, such as major_lowercase. 3 Click Type & Label. Change the variable type to String, and set its length to 58. 4 In the String Expression box, enter the formula: LOWER (Major) 5 When finished, click OK.

How to add and subtract dates in SPSS?

SPSS DATESUM adds a number of time units to a date variable. For subtracting time, just enter a negative value. So say I want to contact respondents 3 months after they entered the hospital. However, 7 days before contacting them, they should be sent a notification. The syntax below shows how to add both dates to our data.

How do you create missing values in SPSS?

In SPSS, to create a new variable with all missing values, you use the compute command and set the new variable equal to $sysmis . The SPSS system variable $sysmis creates system missing values. We also use the do if command, which is useful when you want to recode a variable based on different values of another variable.