Singular Matrix Problem

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

Singular Matrix Problem

Post by Sinke » Thu Jul 04, 2019 6:44 pm

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

Re: Singular Matrix Problem

Post by jmbecker » Fri Jul 12, 2019 12:10 pm

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/Ja ... v=hdr_xprf
GoogleScholar: http://scholar.google.de/citations?user ... AAAJ&hl=de

Sinke
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Joined: Thu Jul 04, 2019 6:35 pm
Real name and title: Sina keppler

Re: Singular Matrix Problem

Post by Sinke » Sat Jul 13, 2019 11:12 am

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
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Real name and title: Dr. Locky Law
Location: Hong Kong

Re: Singular Matrix Problem

Post by lockylaw » Thu Jul 18, 2019 8:28 am

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

Sinke
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Joined: Thu Jul 04, 2019 6:35 pm
Real name and title: Sina keppler

Re: Singular Matrix Problem

Post by Sinke » Thu Jul 18, 2019 3:21 pm

Thanks for your help, i will Try that :)

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