Any help with these errors


The message already gives a good hint for your question. Simple run the cells that create (import) those variables (or functions).

Every time you open the notebook, you must re-run all of the cells starting from the top.

@Alaasultan84 please make sure that you have imported the dataset correctly.
there are two probable reasons for this error

  1. You didn’t Import the dataset and tried to load the dataset.
  2. You didn’t execute the previous cells

Thank you.