[DDI-SRG] Questions on inline ncube example

[Wendy Thomas]

send examples of the table contents you want to describe. On first shot my 
responses would be:

no
yes (using the attribute)
yes (nested coding schemes

On Wed, 28 Nov 2007, Joachim Wackerow wrote:

> Some additional questions on this:
>
> How is it possible to describe a sparse matrix in an inline ncube
> without including all the empty cells?
>
> Can a weighted table described as such? Or did I miss something?
>
> Re 5: The margin sums can be described for a three-dimensional table by
> three additional two-dimensional ncubes. Is there an easier way?
>
> Achim
>
> Joachim Wackerow wrote:
>> Wendy,
>>
>> I'm looking into how to use ncubes for the exchange of tables (structure
>> approach). I made a inline ncube example for a three-dimensional table.
>> Please look over it if everything is correct. I'm not sure with this.
>>
>> Making this example, some questions raised:
>>
>> 1. 'NCubeInstanceReference' should reference the NCube description in
>> the logical product. But a element 'NCubeInstance' exists in the ncube
>> module. This is confusing to me. Assuming the documentation is correct,
>> then the name should not express that it is a reference to a
>> NCubeInstance but to a Ncube like 'NCubeReference'.
>>
>> 2. Repeating the container 'MeasureValue' for each cell, also the
>> 'MeasureReference' is repeated in this case of a regular
>> three-dimensional table. Should there exist a 'DefaultMeasureReference'?
>>
>> 3. Ordering the MeasureValue's I assumed a hierarchy in the dimensions
>> expressed by the rank, the dimension with the first rank changing the
>> fastest, the dimension with the second rank changing the second fastest
>> (the sequence of the vlues corresponds to the cells in the display table
>> from left to right in one row, then the next row, then the next
>> sub-table). Is this correct? I didn't find anything related in the
>> documentation.
>>
>> 4. Does 'GrossRecordStructure' make sense with a inline ncube (with
>> 'LogicalRecordReference' and 'PhysicalRecordSegment')? It is required here.
>>
>> 5. How would you describe the margin sums? It can make sense for large
>> tables.
>>
>> 6. I would like to describe the same table with percentages. I assume
>> that the 'RecordLayout' must be repeated with the percentage values and
>> a reference to a measure variable for percentages in logicalproduct.
>>
>> 7. The type of the measure is described by the label of the measure
>> variable in logicalproduct or by the related 'ConceptReference'. I think
>> it would make sense to describe it by a controlled vocabulary like for
>> category statistics.
>>
>> 8. The concept of 'NCube/Attribute' is not clear to me. Can you please
>> describe it.
>>
>> The display tables are available at:
>> values
>> http://exanda.zuma-mannheim.de/Study_Wohlfahrtssurvey/Independent_SCHULAB/Dependent_ALTER1/Group_GESCHL/Weight_Weight/OutputType_Value/FileType_HTML/Trivariate.html
>>
>> row percentages
>> http://exanda.zuma-mannheim.de/Study_Wohlfahrtssurvey/Independent_SCHULAB/Dependent_ALTER1/Group_GESCHL/Weight_Weight/OutputType_RowPercent/FileType_HTML/Trivariate.html
>>
>>
>> Achim
>>
>>
>> ------------------------------------------------------------------------
>>
>> _______________________________________________
>> DDI-SRG mailing list
>> DDI-SRG at icpsr.umich.edu
>> http://www.icpsr.umich.edu/mailman/listinfo/ddi-srg
>
> _______________________________________________
> DDI-SRG mailing list
> DDI-SRG at icpsr.umich.edu
> http://www.icpsr.umich.edu/mailman/listinfo/ddi-srg
>

Wendy L. Thomas                          Phone: +1 612.624.4389
Data Access Core Director		 Fax:   +1 612.626.8375
Minnesota Population Center              Email: wlt at pop.umn.edu
University of Minnesota
50 Willey Hall
225 19th Avenue South
Minneapolis, MN 55455