[Feature request] dedicated tutorial on updating database values

[nick-youngblut]

Is your feature request related to a problem? Please describe.

It would be helpful to have a dedicated tutorial on updating values in a database (e.g., convert all NaN values in an obs metadata column to 0). I believe this would involve:

• Querying
  • For NaN values, I've tried tiledbsoma.AxisQuery(value_filter='is_null(my_column)'), but that doesn't work.
• Converting the obs metadata to a pandas dataframe
• Modifying the values of interest (e.g., NaN => 0) in the dataframe
• Updating the records of interest in the TileDB database
  • Really not sure how to do this

Describe alternatives you've considered

The existing tutorials, API docs, and getting help from LLMs