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Self Organizing Map formula

utkcito

Hello,

I used the SOM feature to identify some clusters in my data. This has been very helpful and interesting. Yet, in order to publish, I need to replicate those results in an open platform like R, or, alternatively, have a reference to the procedure / formulas used by JMP for the SOM. Currently using the SOM included in R we do not get the same results, thus I need to know what is JMP's application of SOM i.e. formula, parameters, sequence of the calculations, etc.

I contacted my local support and they suggested I ask here.

Thanks,

Uriel.

Accepted answers

nascif_jmp

Hi there,

We do not support R code generation, but we support Python code generation which hopefully would count as an open platform for you to publish your results.

After you create your clusters, publish the results to the Formula Depot and from there choose the "Generate Python code" option.

I attached a few screenshots that illustrate the steps.

Good luck and let us know if you have any questions!

Cluster_som.py

All comments

txnelson

A good start would be to read the documentation on the SOM algorithm in the Multivariate Methods guide.
Help==>Books==>Multivariate Methods

utkcito

Thanks, but I already did that. all that's there are general refences and concepts, nothing concrete that you can do math or stats with.

Uriel.

txnelson

I now suggest that you go to the source, support@jmp.com to get your question answered.

Craige_Hales

https://www.jmp.com/content/dam/jmp/documents/en/support/jmp12/Multivariate-Methods.pdf page 70 seems pretty detailed.

utkcito

thanks for your suggestion, but, once again, I need the actual formulas, algorithm or scripts of the process being done, not just the description. there are different implementations and the devil is in the details...

Thanks,

Uriel