## Singular Matrix Problem

Small talk on SmartPLS that does not correspond to the other forums!
Sinke
PLS Junior User
Posts: 3
Joined: Thu Jul 04, 2019 6:35 pm
Real name and title: Sina keppler

### Singular Matrix Problem

Hello,

When i want to do a multigroupe analysis of My Formative Model with Smart pls to seperate People in two groups Theres a Singular Matrix Problem. I read, that it can help to check the correlations of the indicators, But i cant find this Function. I only found the correlation Matrix of the variables But Not of Indicators.

Can someone help me with My Problem. I‘m really desperate because i‘m Not a statistical expert :(

jmbecker
SmartPLS Developer
Posts: 1045
Joined: Tue Mar 28, 2006 11:09 am
Real name and title: Dr. Jan-Michael Becker

### Re: Singular Matrix Problem

The "indicators" is another word for the items/manifest variables that you assign to a construct as measurement model. Thus, they are the variables in your dataset.

A common problem with singular matrix in MGA is fact that people include the grouping variable in their model (e.g., gender). This variable will have no (zero) variance after splitting the dataset into each group and thus cannot be used within the model anymore.
Dr. Jan-Michael Becker, University of Cologne, SmartPLS Developer
Researchgate: https://www.researchgate.net/profile/Jan_Michael_Becker

Sinke
PLS Junior User
Posts: 3
Joined: Thu Jul 04, 2019 6:35 pm
Real name and title: Sina keppler

### Re: Singular Matrix Problem

I didnt include Group variables in My Model. After Dome Research i think now, that of My groupe samples Are too small (for example there Are only 23 female persons).
Maybe Thats too less for My Model.

lockylaw
PLS Junior User
Posts: 9
Joined: Thu Apr 25, 2019 7:18 am
Real name and title: Dr. Locky Law
Location: Hong Kong

### Re: Singular Matrix Problem

Indeed that is a little too small. Otherwise, you can try lowering the subsamples and repeating bootstrapping until you get a result.

Sinke
PLS Junior User
Posts: 3
Joined: Thu Jul 04, 2019 6:35 pm
Real name and title: Sina keppler

### Re: Singular Matrix Problem

Thanks for your help, i will Try that :)

zuna
PLS Junior User
Posts: 1
Joined: Mon Oct 07, 2019 7:57 am
Real name and title: zunawanis kalbi, S.P.

### Re: Singular Matrix Problem

i have the same problems. I am newcomers to use the SmartPLS. but when I'm Run. the calculating said it is SINGULAR MATRIX PORBLEMs. I have 100 samples and 18 Indicators. how to solve the problem ? can everyone help me? thankyou

jmbecker
SmartPLS Developer
Posts: 1045
Joined: Tue Mar 28, 2006 11:09 am
Real name and title: Dr. Jan-Michael Becker

### Re: Singular Matrix Problem

The problem message already gives some suggestion to resolve the problem. Here we discussed some more. Did you try any of these?
Dr. Jan-Michael Becker, University of Cologne, SmartPLS Developer
Researchgate: https://www.researchgate.net/profile/Jan_Michael_Becker