SPSS-Cluster Analysis-Query

[VIKRAMPATIL]

Hi,

We are having data of 1,20,000 records

We need to run cluster analysis with 3 variables

Now for deciding the number of cluster when I am running the Hierarchical cluster analysis ,getting the msg. iinsufficient memory

Can you please let us know any solution 'How can we decide the number of clusters for 1,20,000 recirds and 3 variables

Regards,
Vikram

[Poling, Taylor Leigh]

Try the Two-Step cluster algorithm in SPSS - I'm pretty sure it was designed specifically to handle large datasets.

 

Taylor

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From: SPSSX(r) Discussion on behalf of VIKRAMPATIL
Sent: Tue 7/21/2009 10:24 AM
To: [hidden email]
Subject: SPSS-Cluster Analysis-Query

Hi,

We are having data of 1,20,000 records

We need to run cluster analysis with 3 variables

Now for deciding the number of cluster when I am running the Hierarchical cluster analysis ,getting the msg. iinsufficient memory

Can you please let us know any solution 'How can we decide the number of clusters for 1,20,000 recirds and 3 variables

Regards,
Vikram

[Oliver, Richard]

Yes, Twostep Cluster is designed to work with large datasets. By default, it will also automatically determine the number of clusters.

 

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From: SPSSX(r) Discussion [mailto:[hidden email]] On Behalf Of Poling, Taylor Leigh
Sent: Tuesday, July 21, 2009 11:55 AM
To: [hidden email]
Subject: Re: SPSS-Cluster Analysis-Query

 

Try the Two-Step cluster algorithm in SPSS - I'm pretty sure it was designed specifically to handle large datasets.

 

Taylor

 

---

From: SPSSX(r) Discussion on behalf of VIKRAMPATIL
Sent: Tue 7/21/2009 10:24 AM
To: [hidden email]
Subject: SPSS-Cluster Analysis-Query

Hi,

We are having data of 1,20,000 records

We need to run cluster analysis with 3 variables

Now for deciding the number of cluster when I am running the Hierarchical cluster analysis ,getting the msg. iinsufficient memory

Can you please let us know any solution 'How can we decide the number of clusters for 1,20,000 recirds and 3 variables

Regards,
Vikram

 

[Guerrero, Rodrigo]

Hello all,

 

I have two statistical questions about Logistic Regression, although it is not necessarily SPSS related.  I am running a model to predict response of our direct mail campaign and have both ratio as well as categorical independent variables.  Some of these categorical variables have missing data for cases. In some variables, more than half the data is missing.

 

1)       What do you think the implications are of treating missing as a valid value and including those records in the equation?

 

2)      I am concerned about over fitting the model.  How can I test the model to avoid this pitfall?

 

 

Thank you very much for your help.

 

 

Rodrigo

 

 

Rodrigo A. Guerrero | Director Of Marketing Research and Analysis | The Scooter Store | 830.627.4317

 

 

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