Adding Legends in R
Make sure you explain your visual encodings so that others can interpret them.
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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.
How I Made That: Interactive Heatmap
Add interaction so that you can show different segments of the data and allow comparisons.
How to Make Smoothed Density Maps in R
Too many points to plot often means obscured patterns in the clutter. Density maps offer a smooth alternative.