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Mplus Users Guide v6.. - Muthén & Muthén

Mplus Users Guide v6.. - Muthén & Muthén

Mplus Users Guide v6.. - Muthén & Muthén

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CHAPTER 18COOKSWhen SAVE=COOKS is used, Cook’s D (Cook, 1977) is saved for eachobservation along with the other analysis variables. This measure is astatistic that computes the influence of an observation on the parameterestimates. The COOKS option is not available for TYPE=EFA andBASIC, the MONTECARLO command, and the BOOTSTRAP optionof the ANALYSIS command. The COOKS option can becomputationally demanding because the model is re-estimated as manytimes as there are observations. Following is an example of how thisoption is specified:SAVE = COOKS;MERGING DATA SETSThe following options are used in conjunction with the FILE option ofthe DATA command and the FILE option of the SAVEDATA commandto merge the analysis data set with the data set named using the MFILEoption described below. Only individual data sets can be merged. Bothdata sets must contain an ID variable which is used for merging.MFILEThe MFILE option is used to specify the name and location of the ASCIIfile that is merged with the file named in the FILE option of the DATAcommand. It is specified asMFILE IS c:\merge\merge.dat;where merge.dat is the name of the ASCII file containing the data to bemerged with the data set named using the FILE option of the DATAcommand. In this example, the file merge.dat is located in the directoryc:\merge. If the full path name of the data set contains any blanks, thefull path name must have quotes around it.If the name of the data set is specified with a path, the directoryspecified by the path is checked. If the name of the data set is specifiedwithout a path, the local directory is checked. If the data set is not foundin the local directory, the directory where the input file is located ischecked.676

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