Data Science Essentials in Python

Your Turn

I hope I convinced you that numpy is an excellent toolset when it comes to number crunching. It treats vectors and matrices as first-class citizens; provides vectorized arithmetic, logical, and other operations; and provides a means for data reshaping, ordering, and aggregation. It even supplies a weird creature called nan, which is a number that is not a number. Can you tame some of the computationally intensive projects with numpy?

Array Differentiator^*

Partial sums are a rough equivalent of an integral. In fact, calculus defines an integral as an infinite sum of infinitesimal elements. Partial differences arr_i+1-arr_i are a rough equivalent of a derivative. numpy doesn’t provide a tool for calculating partial array differences. ...