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Jan 16, 2023 •196 likes •599 views

The Coordinates Layer IN TERMEDIATE DATA VIS UALIZ ATION W ITH GGP LOT2 Rick Scavetta Founder, Scavetta Academy Coordinates layer Controls plot dimensions coord_ e.g. coord_cartesian() INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2 Zooming

  1. The Coordinates Layer IN TERMEDIATE DATA VIS UALIZ ATION W ITH GGP LOT2 Rick Scavetta Founder, Scavetta Academy

  2. Coordinates layer Controls plot dimensions coord_ e.g. coord_cartesian() INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  3. Zooming in coord_cartesian(xlim = ...) scale_x_continuous(limits = ...) xlim(...) INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  4. Original plot iris.smooth <- ggplot( iris, aes(x = Sepal.Length, y = Sepal.Width, color = Species) ) + geom_point(alpha = 0.7) + geom_smooth() iris.smooth INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  5. scale_x_continuous() iris.smooth + scale_x_continuous(limits = c( Removed 95 rows containing non-f (stat_smooth). Removed 95 rows containing missi (geom_point). INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  6. scale_x_continuous() Original plot Zoom in with scale_x_continuous() Part of original data is �ltered out! INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  7. xlim() iris.smooth + xlim(c(4.5, 5.5)) Removed 95 rows containing non-f (stat_smooth). Removed 95 rows containing missi (geom_point). INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  8. coord_cartesian() iris.smooth + coord_cartesian(xlim = c(4 INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  9. Aspect ratio Height-to-width ratio Watch out for deception! No universal standard so far Typically use 1:1 if data is on the same scale INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  10. Sunspots library(zoo) sunspots.m <- data.frame( year = index(sunspot.month), value = reshape2::melt(sunsp ) ggplot(sunspots.m, aes(x = year, geom_line() + coord_fixed() # default to 1:1 INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  11. Sunspots ggplot(sunspots.m, aes(x = year, y = value)) + geom_line() + coord_fixed(0.055) INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  12. Practice time! IN TERMEDIATE DATA VIS UALIZ ATION W ITH GGP LOT2

  13. Coordinates vs. scales IN TERMEDIATE DATA VIS UALIZ ATION W ITH GGP LOT2 Rick Scavetta Founder, Scavetta Academy

  14. Plot the raw data ggplot(msleep, aes(bodywt, y = 1)) + geom_jitter() + scale_x_continuous(limits = c(0, 7000), breaks = seq(0, 7000, 1000)) INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  15. Transform the raw data ggplot(msleep, aes(log10(bodywt), y = 1)) + geom_jitter() + scale_x_continuous(limits = c(-3, 4), breaks = -3:4) INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  16. Add logtick annotation ggplot(msleep, aes(log10(bodywt), y = 1)) + geom_jitter() + scale_x_continuous(limits = c(-3, 4), breaks = -3:4) + annotation_logticks(sides = "b") INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  17. Use scale_*_log10() ggplot(msleep, aes(bodywt, y = 1)) + geom_jitter() + scale_x_log10(limits = c(1e-03, 1e+04)) INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  18. Compare direct transform and scale_*_log10() output INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  19. Use coord_trans() ggplot(msleep, aes(bodywt, y = 1)) + geom_jitter() + coord_trans(x = "log10") INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  20. Compare scale_*_log10() and coord_trans() output INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  21. Adjusting labels INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  22. Time for exercises IN TERMEDIATE DATA VIS UALIZ ATION W ITH GGP LOT2

  23. Double and �ipped axes IN TERMEDIATE DATA VIS UALIZ ATION W ITH GGP LOT2 Rick Scavetta Founder, Scavetta Academy

  24. Typical axis modi�cations Aspect ratios (see video 1) Adjust for best perspective Transformation functions (e.g. log, see video 2) Adjust if original scale is inappropriate Double x or y axes Add raw and transformed values Flipped axes Change direction of dependencies Change geometry orientation INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  25. Typical axis modi�cations Aspect ratios (see video 1) Adjust for best perspective Transformation functions (e.g. log, see video 2) Adjust if original scale is inappropriate Double x or y axes Add raw and transformed values Flipped axes Change direction of dependencies Change geometry orientation 1 2 See chapter 4, video 3 for more discussion on double x and y axes. INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  26. Double axes INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  27. Adding raw and transformed axes INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  28. Typical axis modi�cations Aspect ratios (see video 1) Adjust for best perspective Transformation functions (e.g. log, see video 2) Adjust if original scale is inappropriate Double x or y axes Add raw and transformed values Flipped axes Change direction of dependencies Change geometry orientation INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  29. Flipping axes ggplot(iris, aes(x = Sepal.L y = Sepal.W color = Spe geom_point() + geom_smooth(method = "lm", se = FALSE) INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  30. coord_�ip() ggplot(iris, aes(x = Sepal.L y = Sepal.W color = Spe geom_point() + geom_smooth(method = "lm", se = FALSE) + coord_flip() INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  31. Let's practice! IN TERMEDIATE DATA VIS UALIZ ATION W ITH GGP LOT2

  32. Polar coordinates IN TERMEDIATE DATA VIS UALIZ ATION W ITH GGP LOT2 Rick Scavetta Founder, Scavetta Academy

  33. Projections control perception Cartesian (2d) Orthogonal x and y-axes Modify axis limits and aspect ratio INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  34. Projections control perception Cartesian (2d) Orthogonal x and y-axes Modify axis limits and aspect ratio Maps Many possible projections See next course INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  35. A preview of map projections The Mercator Projection The Conic Projection INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  36. Polar coordinates Cartesian (2d) Orthogonal x and y-axes. Maps Many projections, see next course Polar Transformed Cartesian space INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  37. coord_polar() p + coord_fixed() p + coord_polar() INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  38. coord_polar(theta = "y") p + coord_fixed() p + coord_polar(theta = "y") INTERMEDIATE DATA VISUALIZATION WITH GGPLOT2

  39. Let's practice! IN TERMEDIATE DATA VIS UALIZ ATION W ITH GGP LOT2

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