Sums, Means and Axes
Aggregate methods boil an array down: sum, mean, min, max, std. argmax and argmin give the position of the largest and smallest. On a 2D array, axis=0 works down the columns and axis=1 works along the rows.
Examplepython
Quick check
For a 2D array, `axis=1` aggregates...
Your turn: write the code
Print the mean of each column of the grid (axis=0).
Finish the quick check (and any code exercise) to complete this lesson, or mark it done yourself.
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