Seth-Rothschild
commented
6 years ago Hi @dylancsumner,
That's a great question! We're reorganizing our Q&A to move "How do I..." type questions over to Stack Overflow with the featuretools tag. Would you mind asking this there?
Sometimes we may have null values for the cutoff time. Consider the case where we are trying to generate features to predict whether or not we will sell a product to a customer. We want to exclude all data after the sale. So for customer we sold to, there is one point in time where they became a 'sold to' customer. But for customers we did not sell to, there is no one single point where they became 'not a sale'. In this case, we want to include all the data. We could represent this with a null value in the cutoff time df.
Forgive me if I am missing something, but I am not aware of a way to do this currently in featuretools? Null values in the cutoff time will throw an error?