How to Make Interactive Frequency Trails with D3.js
Layering time series data or distributions with this method can change the feel and aesthetic versus a multi-line chart or small multiples. In some cases, frequency trails let you show more in less space.
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How to Make a Contour Map
Filled contour plots are useful for looking at density across two dimensions and are often used to visualize geographic data. It’s straightforward to make them in R — once you get your data in the right format, that is.
How to Make Frequency Trails in R
Also known as ridgeline plots, the method overlaps time series for a 3-D-ish view of the data. While perhaps not the most visually efficient, the allure is undeniable.
How to Make Slopegraphs in R
Also known as specialized or custom line charts. Figure out how to draw lines with the right spacing and pointed in the right direction, and you’ve got your slopegraphs.