Hi.
When I add control variables, Singular Matrix Problem occurred.
Each control variables are categorical variable. So I transformed all of them to dummy variable.
My sample size is 307.
The number of control variable is 12 which are demographic variables(age, income, etc) and use experiences(watching time, platform type, favorite genre, etc).
So dummy variables are a lot.
For example, Age - dummy variable : age1(10~19old), age2(20~29old) like this.
Unfortunately, Even I read information that the software said, I don't know what dummy variable is troublesome.
How can I solve this problem?
Singular Matrix Problem
-
jmbecker
- SmartPLS Developer
- Posts: 1265
- Joined: Tue Mar 28, 2006 11:09 am
- Real name and title: Dr. Jan-Michael Becker
Re: Singular Matrix Problem
If you have three categories, you add only 2 dummy variables. If you add dummy variables for all categories you will get this error.
The category that does not have a dummy variable is the reference category (baseline).
The category that does not have a dummy variable is the reference category (baseline).
Dr. Jan-Michael Becker, BI Norwegian Business School, SmartPLS Developer
Researchgate: https://www.researchgate.net/profile/Jan_Michael_Becker
GoogleScholar: http://scholar.google.de/citations?user ... AAAJ&hl=de
Researchgate: https://www.researchgate.net/profile/Jan_Michael_Becker
GoogleScholar: http://scholar.google.de/citations?user ... AAAJ&hl=de
-
Harman
- PLS Junior User
- Posts: 1
- Joined: Thu Nov 05, 2020 12:19 pm
- Real name and title: Harmanjit Singh
Re: Singular Matrix Problem
Hi Prof. Becker,
How to interpret this aspect, i.e. baseline/reference vs dummy variables for rest of the categories?
I will appreciate if you can share some resource which I can read/watch on this.
How to interpret this aspect, i.e. baseline/reference vs dummy variables for rest of the categories?
I will appreciate if you can share some resource which I can read/watch on this.