scale {chron}

Coordinates and Positions for Chronological Objects

Description

chron_trans is a ggplot2 transformer for chron. scale_x_chron and scale_y_chron are ggplot2 scales.

Usage

  chron_trans(format = "%Y-%m-%d", n = 5)
  scale_x_chron(..., format = "%Y-%m-%d", n = 5)
  scale_y_chron(..., format = "%Y-%m-%d", n = 5)

Arguments

format

format string as described in strptime.

n

Approximate number of axis ticks.

...

Passed to scale_x_continuous.

Examples

if(require("ggplot2")) {
    dd <- data.frame(tt = chron(1:10), value = 101:110)
    p <- ggplot(dd, aes(tt, value)) +
             geom_point() + scale_x_chron(format = "%m-%d")
    print(p)
}