English, Article, Journal or magazine article edition: Extending xi Phil Ender; Michael Mitchell

User activity

Share to:
 
Bookmark: http://trove.nla.gov.au/version/74383
Physical Description
  • preprint
Language
  • English

Edition details

Title
  • Extending xi
Author
  • Phil Ender
  • Michael Mitchell
Physical Description
  • preprint
Notes
  • Stata's xi command performs dummy (indicator) coding on the fly and with the "*" operator allows for the interaction of two categorical variables or a categorical with a continuous variable. xi3 extends the capabilities of xi to include a number of additional coding systems and can create codings that allow for testing simple contrasts and simple effects. In addition to indicator coding, xi3 supports the following coding schemes: simple coding - compares each level to a reference level deviation coding - deviations from the grand mean Helmert coding - compares levels of a variable w/​ the mean of subsequent levels reverse Helmert coding - compares levels of a variable w/​ the mean of previous levels forward differences - adjacent levels, each vs. next backward differences - adjacent levels, each vs. previous orthogonal polynomial coding Additionally, xi3 supports user defined coding schemes which allow virtually any type of contrast to be used. Like xi, xi3 can be used in conjunction any of the estimation commands. xi3 will do three-way interactions with categorical variables, a mixture of categorical and continuous variables, or with continuous variables alone. xi3 can be issued as a stand alone command. In addition to the "*" operator for interactions, xi3 adds the "@" operator which performs the coding separately for each level of the second variable to allow for simple contrasts and simple effects.
  • RePEc:boc:asug03:02
Language
  • English
Contributed by
OAIster

Get this edition

Other links

  • Set up My libraries

    How do I set up "My libraries"?

    In order to set up a list of libraries that you have access to, you must first login or sign up. Then set up a personal list of libraries from your profile page by clicking on your user name at the top right of any screen.

  • All (1)
  • Unknown (1)
None of your libraries hold this item.
None of your libraries hold this item.
None of your libraries hold this item.
None of your libraries hold this item.
None of your libraries hold this item.
None of your libraries hold this item.
None of your libraries hold this item.
None of your libraries hold this item.

User activity


e.g. test cricket, Perth (WA), "Parkes, Henry"

Separate different tags with a comma. To include a comma in your tag, surround the tag with double quotes.

Be the first to add a tag for this edition

Be the first to add this to a list

Comments and reviews

What are comments? Add a comment

No user comments or reviews for this version

Add a comment