what is the error here ? i have the same error in 3,4,5exercises help me
Verify that the 4.1 data set in the example is loaded correctly. Run the cell that generates a data set and splits it into training, cross-validation (CV), and test sets. Then run the unit test from exercise 3. If you still encounter problems, double-check that the variable “classes” is set correctly to the number of output classes (6 for Exercise 3).
It seems there should be more to the bottom of error message, it doesn’t show exactly where the error occurred.
Also, be sure that every time you load a notebook, that you run all of the cells starting from the first cell at the top.
This is how all of the packages are imported and the workspace is configured.
The environment is not saved when you exit the notebook. Only your changes to the code cells are saved - not the working environment.
I solved the error, thanks
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