Validating a Hierarchical Cluster Analysis

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  • čas přidán 22. 08. 2024
  • In this video I show how to determine the most appropriate number of clusters based on the agglomeration schedule in a hierarchical cluster analysis.

Komentáře • 23

  • @Tanujtiwari
    @Tanujtiwari Před 4 lety +1

    thank you very much. my Master's Thesis is complete coz of you!

  • @user-wh1pp2qr7v
    @user-wh1pp2qr7v Před 2 měsíci

    Thank you very much, but how did you enter the label in your hierarchical analytical box that presented string results in the dendrogram?

    • @Gaskination
      @Gaskination  Před 2 měsíci

      I don't think I understand the question. Do you mean the 1, 2, 3, etc. in the blue boxes? It's just a powerpoint square shape that I typed in. The labels on the dendrogram are placed their automatically by SPSS. If you don't see those, perhaps this will help: czcams.com/video/3bAPwFern_4/video.htmlsi=brvFqLZ2g0rZkUnO

  • @chefberrypassionateresearcher

    Professor, Can I do MGA on the groups created after cluster analysis. And do I need to do measurement Invariance for this kind of groups because they all belong to the same study population. Please reply?

    • @Gaskination
      @Gaskination  Před 4 měsíci

      Yes, you can do a multigroup analysis on a model using the cluster membership number as the grouping variable. An invariance test will still confirm the measurement invariance (which is not guaranteed within a single sample, even if they are all from the same study population)

    • @chefberrypassionateresearcher
      @chefberrypassionateresearcher Před 4 měsíci

      @@Gaskination How does measurement invariance actually work incase of groups created from the same population?

    • @Gaskination
      @Gaskination  Před 4 měsíci

      @@chefberrypassionateresearcher Even within the same population there are sub-populations. For example, within a company, there are IT workers and accountants. These are different.

  • @gibson4ever28
    @gibson4ever28 Před 2 lety

    Are the coefficients in the table the same as the heterogeneity measures or how can I determine the individual heterogeneity measures for each cluster solution (Like for 2 clusters, 3 clusters etc...)

  • @nayivassaf
    @nayivassaf Před 5 lety

    But what that distances mean on the X axis? for example, between the bottom cluster line almost on ten and the right line almost on 25

    • @Gaskination
      @Gaskination  Před 5 lety

      It represents the distance between clusters. The larger the x-value the larger the distance (difference) between clusters.

  • @jarlath2000
    @jarlath2000 Před 5 lety

    Hi James, my data set has around 400 observations and produces quite a smooth line graph from the agglomeration schedule. Do you have any advice as to how to determine the appropriate number of clusters in this case?

    • @Gaskination
      @Gaskination  Před 5 lety +1

      In this case, choose a useful number of clusters. 1 or 2 clusters is usually not very helpful. More than six becomes hard to interpret. So, usually 3-5 or six is the best choice.

    • @jarlath2000
      @jarlath2000 Před 5 lety

      @@Gaskination Thanks a bunch, your videos have been a real help

  • @mayurgo10
    @mayurgo10 Před 7 lety

    hi , my data set is of 900 observations in which i am not get the line graph , can you help

    • @Gaskination
      @Gaskination  Před 7 lety

      If you are checking the box for Agglomeration schedule, and it is still not producing the line graph, then I'm not sure. Sorry about that.

  • @flamenkomuva
    @flamenkomuva Před 7 lety

    is there a way to determine variable importance in hierarchical clustering, like you can in two-step?

    • @Gaskination
      @Gaskination  Před 7 lety

      flamenkomuva unfortunately, not that I'm aware of.

    • @flamenkomuva
      @flamenkomuva Před 7 lety

      ok, thanks anyway! and thanks for your videos! :}

  • @leihongwu5879
    @leihongwu5879 Před 7 lety

    shall the grilled chicken nugget separate at the level "3" but not the "4"?

    • @Gaskination
      @Gaskination  Před 7 lety

      The other way. They separate at level four, but not three.

    • @leihongwu5879
      @leihongwu5879 Před 7 lety

      if you look at the distance (X-axis), the distance between grilled chicken and other two occurred even earlier than the second branch, which means they are not "level 4" separation but should be "level 2" instead. You cannot judge a separation simply based on the balancing/number of nodes.