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| Constrain variance and covariance to 0 |
 
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| Anh Hua posted on Friday, June 19, 2020 - 6:58 am
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Hello!
How do I constrain the variance of S3 and the associated covariances (s3 with s1; s3 with s2) to 0? I've browsed through the mplus user guide and the forums and tried by adding s3@0 at the end of my MODEL syntax but this did not work. Thank you.
Here is my syntax below:
title: your title goes here
data: file = "q2.reading.comp.mplus.final.dat";
variable:
names = child months months_c test_rit_score;
usev test_rit_score months_c months2_c
months3_c;
missing=.;
within = months_c months2_c months3_c;
cluster = child;
Define:
test_rit_score=test_rit_score;
months2_c=(months_c*months_c)/5;
months3_c=(months2_c*months_c)/5;
analysis:
type = twolevel random;
estimator = mlf;
iteration = 20000;
miterations = 20000;
convergence = .000001;
algorithm = em; !this was added based on mplus error and suggestion.
model:
%within%
s1 | test_rit_score on months_c;
s2 | test_rit_score on months2_c;
s3 | test_rit_score on months3_c;
%between%
s1 with test_rit_score;
s2 with test_rit_score;
s3 with test_rit_score;
s1 with s2;
s1 with s3;
s2 with s3; |
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Don't make the s3 slope random; just say
test_rit_score on months3_c; |
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| Anh Hua posted on Sunday, June 21, 2020 - 7:59 am
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Dr. Muthen,
Thank you so much for your helpful advice! I'm a complete mplus newbie and your advice really helps me get better at modeling in mplus! |
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