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Practical Predictive Analytics
book

Practical Predictive Analytics

by Ralph Winters
June 2017
Beginner to intermediate content levelBeginner to intermediate
576 pages
15h 22m
English
Packt Publishing
Content preview from Practical Predictive Analytics

Running the time-based model

Now that we have reformatted the data, we are already ready to run the second time-based model.

The CoxModel.2 variable is created in a similar fashion as CoxModel.1, however Xsatisfaction2 is substituted for Xsatisfaction to account for the change in satisfaction due to the follow-up study. The new time0 variable is also substituted for the original tenure variable, and Churn2 is substituted for the original churn response variable:

CoxModel.2 <- coxph(Surv(time0,Xtenure2, Churn2) ~                      Xeducation + Xgender + Xsatisfaction2 + Xservice.calls +                      Xpurch.last.month + Xmonthly.charges,                    data=SURV2)

Avoid overwriting existing variable names. Either create new variables within an existing dataframe or preserve the old ...

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Publisher Resources

ISBN: 9781785886188Supplemental Content