Selecting elements |
This is for 32-bit Facets 3.87. Here is Help for 64-bit Facets 4
Question: Is there a simple way to select subsets of cases from a data file for Facets analysis? Specifically, if I had a dataset in which I embedded a group ID in one of the facet labels or in the examinee ID, could I select only the cases where the group ID is a single number?
For example, suppose I created a data set like this:
1ID1,…
1ID2,…
2ID3,…
2ID4,…
Is there a simple way to tell Facets only to use the cases where the first column of the first variable is 1?
Answer: DVALUES= can help you.
Define a dummy facet of "Group ID"
Facets = 4 ; examinee, item, rater, Group ID
Models =
?, ?, ?, 1, R4 ; selects only group 1 for analysis
*
Labels =
1, Examinee
1= 1ID1,…
2= 1ID2,…
3 =2ID3,…
4 = 2ID4,…
....
*
2, item
...
*
3, rater
....
*
4, Group ID, A or D ; dummy facet used only for selection (can also be used for interactions, etc.)
1 = Group 1, 0
2 = Group 2, 0
3 = Group 3, 0
4 = Group 4, 0
*
Dvalues =
4, 1, 1 ; the element identifier for facet 4 is in facet 1, the first character of the element label
*
Data =
examinee, item, rater, observation ; do not specify an element number for facet 4 here
.....
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