Indexing and Slicing
Index with square brackets, starting at 0. Negative numbers count from the end. A slice a[start:stop] stops before stop. For 2D arrays use a[row, column], and : means "all".
Examplepython
Quick check
In `m = np.arange(1, 10).reshape(3, 3)`, what is `m[2, 0]`?
Your turn: write the code
Print the second column of m (all rows, column index 1).
Finish the quick check (and any code exercise) to complete this lesson, or mark it done yourself.
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