Create glyphplot data

Create the data needed to generate a glyph plot.

glyphs(
  data,
  x_major,
  x_minor,
  y_major,
  y_minor,
  polar = FALSE,
  height = ggplot2::rel(0.95),
  width = ggplot2::rel(0.95),
  y_scale = identity,
  x_scale = identity
)

Arguments

data

A data frame containing variables named in x_major, x_minor, y_major and y_minor.

x_major, x_minor, y_major, y_minor

The name of the variable (as a string) for the major and minor x and y axes. Together, each unique

polar

A logical of length 1, specifying whether the glyphs should be drawn in polar coordinates. Defaults to FALSE.

height, width

The height and width of each glyph. Defaults to 95% of the resolution of the data. Specify the width absolutely by supplying a numeric vector of length 1, or relative to the

y_scale, x_scale

The scaling function to be applied to each set of minor values within a grid cell. Defaults to identity so that no scaling is performed.

Author

Di Cook, Heike Hofmann, Hadley Wickham

Examples

# Small function to display plots only if it's interactive
p_ <- GGally::print_if_interactive

data(nasa)
nasaLate <- nasa[
  nasa$date >= as.POSIXct("1998-01-01") &
    nasa$lat >= 20 &
    nasa$lat <= 40 &
    nasa$long >= -80 &
    nasa$long <= -60,
]
temp.gly <- glyphs(nasaLate, "long", "day", "lat", "surftemp", height = 2.5)
#> Using width 2.38
p_(ggplot2::ggplot(temp.gly, ggplot2::aes(gx, gy, group = gid)) +
  add_ref_lines(temp.gly, color = "grey90") +
  add_ref_boxes(temp.gly, color = "grey90") +
  ggplot2::geom_path() +
  ggplot2::theme_bw() +
  ggplot2::labs(x = "", y = ""))