time_varying_media and lift test

[malitsadok1]

Hi ,
I tried using time_varying_media = True with my MMM model and adding a lift test with the function add_lift_test_measurements, but I encountered an error:
MissingValueError: "The value ['date'] is missing from the required ['channel', 'date']"

I know that the required values are: channel, x, delta_x, delta_y, and sigma. I tried adding date to see if it would help, but it didn't. However, when I removed time_varying_media = True from the model, the error disappeared.
any idea what’s causing this or how I can fix it?

[wd60622]

Yeah, you will require a date column to map the lift test to a date in the model in the case of time varying media. Can you set the date column to one of the dates from training data set and share error.

[malitsadok1]

Thank you for the quick response.
I added the column date in the following formats:

1. "date": [pd.to_datetime("2024-08-01")]
2. "date": ["2024-08-01"]

However, I am still getting the same error:

MissingValueError Traceback (most recent call last)
in <cell line: 1>()
----> 1 mmm.add_lift_test_measurements(df_lift_test)

3 frames
/usr/local/lib/python3.10/dist-packages/pymc_marketing/mmm/lift_test.py in assert_is_subset(required, available)
248 missing = required - available
249 if missing:
--> 250 raise MissingValueError(list(missing), list(required))
251
252

MissingValueError: "The value ['date'] is missing from the required ['channel', 'date']"

[wd60622]

Okay. Thanks, this is a bug then. Can you please raise an issue for this

[malitsadok1]

thanks!