Polar coordinates

Intermediate Data Visualization with ggplot2

Rick Scavetta

Founder, Scavetta Academy

Projections control perception

• Cartesian (2d)
  • Orthogonal x and y-axes
  • Modify axis limits and aspect ratio

Projections control perception

• Cartesian (2d)
  • Orthogonal x and y-axes
  • Modify axis limits and aspect ratio
• Maps
  • Many possible projections
  • See next course

A preview of map projections

The Mercator Projection

The Conic Projection

Polar coordinates

• Cartesian (2d)
  • Orthogonal x and y-axes.
• Maps
  • Many projections, see next course
• Polar
  • Transformed Cartesian space

coord_polar()

p + coord_fixed()

p + coord_polar()

coord_polar(theta = "y")

p + coord_fixed()

p + coord_polar(theta = "y")

Let's practice!

Intermediate Data Visualization with ggplot2