Missing data options for version 6 PreviousNext
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 Chenshu Zhang posted on Thursday, September 16, 2010 - 4:54 pm
I just found that there is no "missing" option under "analysis: type=" (p519, Mplus user's guide). For the version 4.1 I am working on, there is such an option. I want to know the reason. I also would like to know which are the appropriate estimators for a SEM analyses with coninuous obersved variables when there are missing data. Also, when the observed variables include categorical variables, which are the appropriate estimators? How do I apply FIML to the missing data using version 6?
 Linda K. Muthen posted on Thursday, September 16, 2010 - 7:40 pm
The default starting with Version 5 is TYPE=MISSING. See the ESTIMATOR option in the user's guide to see which estimators are available for various models.
 Chenshu Zhang posted on Friday, September 17, 2010 - 2:13 pm
Thank you. Does that mean once in the data step, I define "missing= vars (flag)", I do not have to specify "type=missing" in the analysis step?
 Linda K. Muthen posted on Friday, September 17, 2010 - 2:37 pm
Starting with Version 5, it is not necessary to specify TYPE=MISSING. It is the default. You do have to specify missing value flags using the MISSING option of the VARIABLE command.
 Sue Lee posted on Thursday, February 03, 2011 - 8:03 pm
Hello,

I'm using Mplus version 5.21. I converted all missing data-points to period (.) and added the following command under the VARIABLE and ANALYSIS:

VARIABLE:
MISSING ARE ALL .;

ANALYSIS:
TYPE = MIXTURE MISSING;

And I keep getting the following warning after the input ends.

*** WARNING in ANALYSIS command
Starting with Version 5, TYPE=MISSING is the default for all analyses.
To obtain listwise deletion, use LISTWISE=ON in the DATA command.
1 WARNING(S) FOUND IN THE INPUT INSTRUCTIONS
===============
I do not want listwise deletion (i.e., excluding an entire record from analysis if any single value is missing).

Then, do I have to rerun the data with a different command under the ANALYSIS or can I just use the current analysis result? I don't understand what the warning exactly tells me to do.

Thank you,
 Linda K. Muthen posted on Thursday, February 03, 2011 - 8:50 pm
You are getting TYPE=MISSING; It is the default. You are not getting listwise deletion. The warning is not telling you to do anything. It is informing you of a default change in the event you want to get listwise deletion.
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