1
vote
2answers
67 views

Segmentation using cluster analysis in SPSS

I am doing a segmentation project and am struggling with cluster analysis in spss right now. Could you please help me get this answered: How do I determine the quality of the clustering in spss? In ...
1
vote
1answer
76 views

Finding groups of similar people

After asking 16 questions (yes or no) to 75 people I have a table of their answers coded like 00110011110101010 ('0'=no and '1'=yes). Now I would like to find ...
1
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0answers
64 views

Relative Variable Importance in Clustering

In SPSS, the user can check the relative variable importance in a clustering result and produce a graph like the following: link: ...
1
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0answers
61 views

Difference between BIRCH and Two-Step Clustering

I don't have SPSS. But judging from the documentation you can find on the internet, SPSS "Two-Step Clustering" seems to be closely related to BIRCH clustering: Zhang, T., Ramakrishnan, R., & ...
1
vote
1answer
274 views

What data structure to use for my cluster analysis or what cluster analysis to use for my data?

I have a large dataset of categorical variables. The data consists of shoppers who purchased two items during a single trip to a store. There are approximately 75,000 cases and 1,500 different ...
1
vote
2answers
130 views

Cluster analysis, what to do with different scales?

I want to identify different groups of respondents out of up to five variables of the European Values Study 2008. At first I took 4 questions for cluster analysis all on a scale from 1 to 10. ...
2
votes
2answers
200 views

Weighting variables in two-step cluster analysis

I'm using SPSS to perform two-step cluster analyses. SPSS shows predictor importance of each variable used in an analysis. Oftentimes, a binary variable like gender (sorry, I'm just keeping it ...
1
vote
1answer
455 views

Cluster analysis on ordinal data

I'd like to perform a cluster analysis on ordinal data (Likert scale) by using SPSS. I have around 140 observations and 20 variables that are scaled from 1 to 5 (1: I strongly agree, 3: neutral, 5: I ...
1
vote
0answers
142 views

Evaluating clusters of variables produced by varclus & hclustvar

Background - I want to cluster analyze a mixed dataset, clustering the variables on the basis of correlational similarity. SPSS gives me this option, but doesn't allow me to evaluate the clustering ...
1
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3answers
377 views

How to cluster time series?

I have a question about cluster analysis. There are 3000 companies, which have to be clustered according to their power usage over 5 years. Each company has values for every hour during 5 years. I ...
1
vote
1answer
203 views

Using mixed variables in two-step cluster analysis

I need to perform cluster analysis on my data set which includes both continuous and categorical type of variables. Having read around, I think K-Means is not a suitable technique for mixed data. Can ...
2
votes
1answer
435 views

Does SPSS rescale dendrograms?

A colleague and I have been clustering some data in SPSS (v19) and R (2.15), respectively. Using the same distance metric and agglomeration method, we get identical merge orders/agglomeration ...
1
vote
1answer
267 views

Clustering time series

I want to create forecasting for a large quantity of time series. Since they are too many, I am thinking on reducing my data by clustering it into to similar groups. However, I am using SPSS modeler ...
2
votes
0answers
389 views

How to cluster standard errors (by country) using SPSS?

I'm trying to obtain robust standard errors as my regression residuals seem to be correlated... My sample data has 8 countries and I would like to cluster the standard errors by these 8 countries ...
1
vote
1answer
564 views

Clustering of time series

I have a set of almost 1600 time series on 2 years which I want to group into clusters. Do you think this is possible using k-means? Which method do you advice me to use? Is this possible at all using ...
1
vote
2answers
578 views

Can I use log-likelihood distance on data of only continuous variables?

I have to run a SPSS two-step cluster analysis. All my 4 variables are continuous scalar standardized parameters (with normal distribution). The dataset includes 10,000 cases. SPSS suggest to use ...
1
vote
2answers
480 views

Interpreting average linkage clustering results in SPSS

I am trying to cluster 6 PC scores for a 1600 cases data (so its a 1600 x 6 matrix). I am using average linkage clustering technique that would be followed by a K mean clustering. The purpose of ...
2
votes
1answer
1k views

How can I compare Likert scale data of two clusters in SPSS?

In SPSS, I want to compare two clusters of management sciences department faculty members in two universities. Which test should I use? Can you explain how to do it in SPSS?
6
votes
1answer
468 views

Derivation of distance in two-step clustering

I am working with the two step cluster process in SPSS Modeler (Clementine) and trying to get a sense for the distance function used. It is a log-likelihood function (as stated in docs) but I am ...