Python allows free creation of plots, unlike expensive, stagnant graphing calculators. Import NumPy and Matplotlib for basic linear and polynomial plots in Python. Seaborn lets you make ...

The humorous plots in his xkcd webcomic are one of the favorite parts for many readers. Their distinctive, Tufteian style delivers the information – in this case, a punch line – without ...

SciPy is a free and open-source Python library (built on top of Numpy) used for scientific computing and technical computing. SciPy contains modules for optimization, linear algebra, integration, ...

Off the Charts is a weekly, subscriber-only guide to The Economist’s award-winning data journalism and the ideas, processes and tools that go into creating it. Sign up for Off the Charts .