How to Create Custom R Variables

To create your own custom R variables, follow these steps:

On the Variables and Questions tab, right click on a variable and select Insert Variable(s) > R Variable.
Under Properties > R CODE, enter your custom R code.
Click the play button to run the code.
Preview your results on the left pane shaded in the blue columns with input data used shaded in grey. Note if you are creating a table/matrix of data with multiple columns, each column will become an R variable in the Question automatically. A one-variable example is below:
Set the Variable Base Name (if desired). This is useful if you want to create more than one R variable at a time. You can do this by making the final result of your R code be multiple columns of data (instead of one), which in turn get expanded to multiple variables in the data set automatically.
Add a Question Name at the bottom of the window and click Add R Variable.
Q will select either Text or Number as the Question Type for the variable. You should review the Question Type and change it, if necessary.
OPTIONAL: If the result is binary (1 or 0) or logical (TRUE or FALSE) and you wish to use this variable as a filter, click the F in the Tags column.
OPTIONAL: If the result is numeric and you wish to use this variable as a weight, click the W in the Tags column.

If you are simply referencing a categorical variable in your code, the labels will carry over when the Question Type is set to Pick One. However, you can also select Values and update the labels there: