What Is a Grouping Factor in Graphical Modelling?

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Discussion Overview

The discussion revolves around the concept of a "grouping factor" in graphical modeling, with participants exploring its definition and relevance in different contexts, including statistical and computer graphics applications.

Discussion Character

  • Exploratory, Debate/contested, Conceptual clarification

Main Points Raised

  • One participant expresses confusion about the term "grouping factor" in graphical modeling and provides an example involving a fixed grouping factor and a response variable.
  • Another participant questions the relevance of the term to probability or statistics, suggesting that in computer graphics, a "grouping factor" refers to a measure of distance between objects.
  • A third participant suggests that the terminology may be specific to certain applications and recommends providing links to resources that define the terms more clearly.

Areas of Agreement / Disagreement

Participants do not appear to agree on the definition or relevance of "grouping factor," with multiple competing views presented regarding its application in different fields.

Contextual Notes

The discussion highlights a potential lack of clarity in terminology across different disciplines, as well as the need for further definitions and context to understand the term fully.

paalfis
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I am staring a course in graphical modelling, and I have no idea what this is.

For example, if I is a fixed grouping factor, and Y is a response, then it is natural to examine the densities fY/I (y/i) for each level i of I.

Thanks!
 
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Thanks for the post! Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
 
I don't believe that has anything to do with probability or statistics. My understanding of "grouping factor" in computer graphics is that the "grouping factor" for a collection of objects is a single number that measures the overall distance between the objects. There are a number of different ways of finding that. One is to take the distance from the "center" of the group to the object most distance from that center.
 
Maybe it's this subject: http://en.wikipedia.org/wiki/Graphical_model The terminology in specialized applications of that sort isn't widely known in the general mathematical community. Paalfis should give a link to material that defines the terms - or else get lucky and attract the attention of a specialist.
 

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