The survival object

Before you start any survival analysis, you need to transform your data into the right form, the survival object. Remember: daysSinceFirstPurch contains the time between first and second order. boughtAgain tells you if there was a second order or not.

The survival package is already loaded to your workspace.

This exercise is part of the course

Machine Learning for Marketing Analytics in R

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Exercise instructions

Create a survival object from dataNextOrder using Surv(). Store the result as survObj.
Take a look at the object's structure.

Hands-on interactive exercise

Have a go at this exercise by completing this sample code.

# Create survival object
survObj <- ___(dataNextOrder$___, dataNextOrder$___)

# Look at structure
___(survObj)

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