How do I use indexing in NumPy arrays?

How do I use indexing in NumPy arrays?

You can use indexing to access and modify elements in a NumPy array. For example, if you have an array arr, you can access the first element with arr[0].

Can I use slicing to get a subarray?

Yes, you can use slicing! For instance, arr[1:4] will give you elements from index 1 to 3.

What about multi-dimensional arrays?

For multi-dimensional arrays, you can use a tuple for indexing. For example, arr[0, 1] accesses the element in the first row and second column.

How do I modify an element using indexing?

You can modify an element by assigning a new value. For example, arr[0] = 10 changes the first element to 10.