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  • Excluding user defined missing values (=conditional NAs) from multiple

    From Adam Smith@21:1/5 to All on Tue Jan 21 08:48:36 2020
    I've got a dataset with survey data. Since some items are not applicable to every participant, I assigned a user defined missing value (i.e. 990). If an item was applicable for a participant, but was not filled in, then I assigned a user defined missing
    value of 999 to it. So when running a multiple imputation, I want all 999-values to be included in the imputation (and therefore all 999-values should be replaced by calculated values), but 990-values shouldn't be replaced at all! How could this be done?
    I am wondering that I've found no answer for this problem although one might assume that this procedure is often requested.
    I posted it on stackexchange also.

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  • From Adam Smith@21:1/5 to All on Tue Jan 21 08:49:30 2020
    Forgot the link to stackexchange: https://stats.stackexchange.com/questions/445690/excluding-user-defined-missing-values-conditional-nas-from-multiple-imputatio

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  • From Bruce Weaver@21:1/5 to Adam Smith on Tue Jan 21 14:43:31 2020
    On Tuesday, January 21, 2020 at 11:48:38 AM UTC-5, Adam Smith wrote:
    I've got a dataset with survey data. Since some items are not applicable to every participant, I assigned a user defined missing value (i.e. 990). If an item was applicable for a participant, but was not filled in, then I assigned a user defined
    missing value of 999 to it. So when running a multiple imputation, I want all 999-values to be included in the imputation (and therefore all 999-values should be replaced by calculated values), but 990-values shouldn't be replaced at all! How could this
    be done? I am wondering that I've found no answer for this problem although one might assume that this procedure is often requested.
    I posted it on stackexchange also.

    This sounds pretty similar (if not identical) to the problem being discussed here:

    http://spssx-discussion.1045642.n5.nabble.com/Multiple-imputation-adding-constraints-to-nominal-data-td5738789.html

    That forum is the SPSSX-L mailing list. Nowadays, it gets a lot more traffic than this old usenet group does. The actual mailing list is administered by U of Georgia, but the link I gave you is for the Nabble archive. The main page is http://spssx-
    discussion.1045642.n5.nabble.com/. Click the <more options> link at the top for info on how to join the mailing list. HTH.

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  • From Adam Smith@21:1/5 to All on Wed Jan 22 09:34:39 2020
    Thank you. Though it looks a lot like I'm gonna have to do it in R …

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