Read in imputed Data sets

[LinusTrenker]

Hey guys,

I have a problem reading in my imputed data sets. The multiple imputation was done in R with the package MICE. In order to read in the multiple imputed data I saved all data.frames as separate files named imputeiter100.dta, imputeiter200.dta, ...

Then I generated a file impvals.txt in the same directory. It has the following structure:
imputed_variable_name_1<WHITESPACE>imputed_variable_name_2<WHITESPACE> ... <NEWLINE>
Number_of_cases<NEWLINE>
Number_of_imputed_datasets<NEWLINE>
imputed_dataset_name_1<TAB>imputed_dataset_name_2<TAB> ... <NEWLINE>

When I try to read this file in MLWin(2.27) with the IRETRieve command, MLWin crashes without any error message.

Any Ideas?

Best regards
Linus

[ChrisCharlton]

The format of your impvals.txt file looks correct, however MLwiN expects the imputed datasets to be in the form of tab-delimited text files rather than Stata .dta files. Could you try again after converting the files to this format and see whether you have more success?

[LinusTrenker]

Hey Chris,

thanks for your reply. This solved my problem. In fact I tried to read in dta files rather than fixed format txt files. With txt files it worked perfectly.