Is dummification limited to certain value range? Academic Researchers INSAID July 27, 2020 08:39 Follow Dummies' concept is not restricted to only certain value, such as 3. If we have 10 values, we first create dummy variables for 10 values and then drop one column. After dummification, we use n-1 variables. Related articles Overlapping of points in scatter plot Comments 0 comments Article is closed for comments.