how to extract "chi square for each group:" values from lavaan when using known groups

Question

I want to extract the individual group chi square values from lavaan output that is provided when conducting multiple, known group sem models. Only the total chi square is provided as a fitMeasure, and the chi square values are not treated as individual estimates in parameterEstimates. There doesn't appear to be any other automated method for extracting this information.

I have been able to use the capture.output() function, and from there I can find the heading for the chi square values, and count the number of lines of values based on the number of groups + 1. Then I can use strsplit() to split on spaces and finally grab the value. I can write a function for this, but I don't want to reinvent the wheel here, so if anyone knows of a built-in argument or existing function I would be much obliged.

score 2 · Answer 1 · edited Mar 26 '18 at 08:17

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With lavInspect() and lavTech() you can extract information from fitted lavaan objects. You can for example extract the chisquare value using:

  x<-lavInspect(model, "fit")
  x["chisq"]

edited Mar 26 '18 at 08:17

L. Bakker

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answered Dec 12 '16 at 20:37

Oscar Kjell

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score 1 · Answer 2 · answered Apr 22 '20 at 15:49

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lavInspect(model, "test")$standard$stat.group

answered Apr 22 '20 at 15:49

Yiu Chung Wong

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Please add some explanation to your answer such that others can learn from it – Nico Haase Apr 24 '20 at 09:36

how to extract "chi square for each group:" values from lavaan when using known groups

2 Answers2