Display tour path with a sliced scatterplot

Animate a 2D tour path with a sliced scatterplot.

display_slice(
  center = TRUE,
  axes = "center",
  half_range = NULL,
  col = "black",
  pch_slice = 20,
  pch_other = 46,
  cex_slice = 2,
  cex_other = 1,
  v_rel = NULL,
  anchor = NULL,
  anchor_nav = "off",
  edges = NULL,
  edges.col = "black",
  palette = "Zissou 1",
  ...
)

animate_slice(data, tour_path = grand_tour(), rescale = FALSE, ...)

Arguments

center: if TRUE, centers projected data to (0,0). This pins the center of data cloud and make it easier to focus on the changing shape rather than position.
axes: position of the axes: center, bottomleft or off
half_range: half range to use when calculating limits of projected. If not set, defaults to maximum distance from origin to each row of data.
col: color to use for points, can be a vector or hexcolors or a factor. Defaults to "black".
pch_slice: marker for plotting points inside the slice. Defaults to 20.
pch_other: marker for plotting points outside the slice. Defaults to 46.
cex_slice: size of the points inside the slice. Defaults to 2.
cex_other: size if the points outside the slice. Defaults to 1.
v_rel: relative volume of the slice. If not set, suggested value is calculated and printed to the screen.
anchor: A vector specifying the reference point to anchor the slice. If NULL (default) the slice will be anchored at the data center.
anchor_nav: position of the anchor: center, topright or off
edges: A two column integer matrix giving indices of ends of lines.
edges.col: colour of edges to be plotted, Defaults to "black.
palette: name of color palette for point colour, used by hcl.colors, default "Zissou 1"
...: other arguments passed on to animate and display_slice
data: matrix, or data frame containing numeric columns
tour_path: tour path generator, defaults to 2d grand tour
rescale: Default FALSE. If TRUE, rescale all variables to range [0,1].

Examples

# Generate samples on a 3d and 5d hollow sphere using the geozoo package
sphere3 <- geozoo::sphere.hollow(3)$points
sphere5 <- geozoo::sphere.hollow(5)$points

# Columns need to be named before launching the tour
colnames(sphere3) <- c("x1", "x2", "x3")
colnames(sphere5) <- c("x1", "x2", "x3", "x4", "x5")

# Animate with the slice display using the default parameters
animate_slice(sphere3)
#> Using half_range 1
#> Using v_rel=0.1, corresponding to a cutoff h=0.1

animate_slice(sphere5)
#> Using half_range 1
#> Using v_rel=0.11, corresponding to a cutoff h=0.48


# Animate with off-center anchoring
anchor3 <- matrix(rep(0.7, 3), ncol=3)
anchor5 <- matrix(rep(0.3, 5), ncol=5)
animate_slice(sphere3, anchor = anchor3)
#> Using half_range 1
#> Using v_rel=0.1, corresponding to a cutoff h=0.1

# Animate with thicker slice to capture more points in each view
animate_slice(sphere5, anchor = anchor5, v_rel = 0.02)
#> Using half_range 1
#> Using v_rel=0.02, corresponding to a cutoff h=0.27