Charts like scatterplots and line charts don’t scale well as datasets grow larger. To address this problem, Twitter recently released Density Plots, an OSS library for interactively visualizing data with density plots – which may represent large volumes of data better. Specifically, density plots represent the distribution of a numerical variable over a continuous interval or time period. This library computes density arrays from (x,y) points and/or time series and renders them visually.