RapidMiner

Interpreting Correlation

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Contributor I k_vishnu772
Contributor I

Interpreting Correlation

HI All ,

 

I  need small help in interpreting the results of cross correlation.i am using it for classification problem where my target is a binary (yes or no) and most of my input variables are polynomials and i ran the correlation after converting them to numerical variables .lets take one example where i have variable1(V1,V2,V4,V5) and variable2 (T1,T2,T3,T5) and i got the correlation result of V1 and T1 as 0.345 and i don't understand how to interpret this value in relation to my binary target.Could ou please help .

 

Regards,

Vishnu

2 REPLIES
RM Certified Expert RM Certified Expert
RM Certified Expert

Re: Interpreting Correlation

You shouldn't interpret the correlation coefficent at all for nominal variables!  I believe the internal calculation is just the correlation based on ranked category values, but this is rarely meaningful.

Brian T., Lindon Ventures - www.lindonventures.com
Analytics Consulting and Training by Certified RapidMiner Analysts
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RM Staff RM Staff
RM Staff

Re: Interpreting Correlation

I agree with Brian. However, you could use the techniques of Polychorical Correlation or Correspondence Analysis to analize your tables. They are both descriptive statistical processes, which are not included in RM.

 

Regards,

Sebastian