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Line Geometry Layer for hd Objects

Source: R/geom-line.R
hd_geom_line.Rd

hd_geom_line() creates a line geometry layer that is added to an hd() object via +. The layer records the geometry type and any geometry-specific arguments; rendering only happens when the hd object is printed.

Usage

hd_geom_line(smooth = TRUE, dot_size = 4, line_symbols = NULL, ...)

Arguments

smooth

Logical. TRUE = spline curves, FALSE = straight segments. Both backends.

dot_size

Numeric. Marker radius in pixels. Both backends.

line_symbols

Character vector. Highcharter only. Per-group marker shapes: "circle", "square", "diamond", "triangle", "triangle-down".

...

Geometry-specific arguments forwarded to hd_make().

Value

An S3 object of class "hd_geom" for use with +.hd.

Examples

# Single series - no group column
spec_line1 <- hd_spec(alco1,
    x    = "year",
    y    = "adj_mean"
)

opts_line <- hd_opts(
    title = "Alcohol consumption over time",
    subtitle = "Source: Norwegian Directorate of Health",
    ylim = c(0, 50),
    ylab = "Litres per capita"
)


# Straight segments
hd_make(spec_line1, "line", opts_line, smooth = FALSE)



# Composite example with multiple geoms and custom line symbols
hd(alco2, x = "year", y = "adj_mean", group = "kjonn", backend = "ggplot2") +
  hd_geom_line(smooth = TRUE, dot_size = 3) +
  hd_opts(title = "Alcohol consumption over time by kjonn",
  subtitle = "Source: Norwegian Directorate of Health")