Simulated data file = ""

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A file of simulated data can be constructed from the measures estimated (or anchored) for the main analysis. It will have one simulated observation for each observation in the original data file. Each simulation is unique, so that multiple different simulations can be obtained with the Output Files menu clicking on Simulated Data file.

 

Simulated data file = filename

The simulated data can be analyzed using Data=filename in the original specification file (or enter at Extra specifications? prompt). Comment out any Dvalues= specifications in the original specification file.

 

The simulated data file has the basic Facets data format:

 

; Simulated data matching the empirical data structure

; Ratings of Scientists (edited to illustrate ambiguity in measurement) 09-02-2004 00:22:46

; matching: C:\FACETS\examples\subsets.txt

1,2,1,7 ; 9 ; 1,2,1 are facet elements. 7 is simulated. 9 is the original data value.

1,2,2,7 ; 7

1,2,3,4 ; 5

1,2,4,9 ; 8

1,2,5,3 ; 5

 

Example: Simulate and analyze 1000 Facets data sets from lfs.txt

Save the following as x.bat in c:\Facets\examples, and then double-click on x.bat.

 

SET /A COUNT=1

LOOP

echo Loop number %COUNT%

rem do this 1000 times

IF %COUNT% == 1001 GOTO END

rem generate simulate data file from lfs.txt

START /WAIT ..\Facets BATCH=YES lfs.txt specfile.out.txt simul=s%COUNT%.txt

rem analyze simulated file

START /WAIT ..\Facets BATCH=YES lfs.txt s%COUNT%.out.txt data=s%COUNT%.txt

SET /A COUNT=COUNT+1

GOTO LOOP

:END

PAUSE

 


Help for Facets Rasch Measurement Software: www.winsteps.com.