spiralize (version 1.0.6)

spiral_horizon: Draw horizon chart along the spiral

Description

Draw horizon chart along the spiral

Usage

spiral_horizon(x, y, y_max = max(abs(y)), n_slices = 4, slice_size,
    pos_fill = "#D73027", neg_fill = "#313695",
    use_bars = FALSE, bar_width = min(diff(x)),
    negative_from_top = FALSE, track_index = current_track_index())

Value

A list of the following objects:

• a color mapping function for colors.

• a vector of intervals that split the data.

Arguments

x

X-locations of the data points.

y

Y-locations of the data points.

y_max

Maximal absolute value on y-axis.

n_slices

Number of slices.

slice_size

Size of the slices. The final number of sizes is ceiling(max(abs(y))/slice_size).

pos_fill

Colors for positive values.

neg_fill

Colors for negative values.

use_bars

Whether to use bars?

bar_width

Width of bars.

negative_from_top

Should negative distribution be drawn from the top?

track_index

Index of the track.

Details

Since the track height is very small in the spiral, horizon chart visualization is a efficient way to visualize distribution-like graphics.

Examples

# \donttest{
df = readRDS(system.file("extdata", "global_temperature.rds", package = "spiralize"))
df = df[df$Source == "GCAG", ]
spiral_initialize_by_time(xlim = range(df$Date), unit_on_axis = "months", period = "year",
    period_per_loop = 20, polar_lines_by = 360/20, 
    vp_param = list(x = unit(0, "npc"), just = "left"))
spiral_track()
spiral_horizon(df$Date, df$Mean, use_bar = TRUE)
# }