IndexError: index 4 is out of bounds for axis 0 with size 4

This error message means that you are trying to access an element in a one-dimensional array that does not exist. In this case, the array has a size of 4, meaning it has elements at indices 0, 1, 2, and 3. However, your code is trying to access an element at index 4, which is outside the bounds of the array.

To fix this error, make sure that you are only accessing valid indices in the array. You may also need to check the size of the array and adjust your code accordingly.