geom_timeline_label: Label Largest Earthquakes on Timeline

In DYZI/Earthquake: "earthquake: Visualizing NOAA's Significant Earthquakes"

Description

geom_timeline_label works best when used with geom_timeline, labeling the top n earthquakes, by magnitude, with a specified label field. By default, the labels are for the top 5 earthquakes for each country specified, however, the user may adjust this with the n_max aesthetic.

Usage

geom_timeline_label(mapping = NULL, data = NULL, stat = "identity",
  position = "identity", na.rm = FALSE, show.legend = NA,
  inherit.aes = TRUE, ...)

Arguments

mapping	See ggplot2 layer
data	See ggplot2 layer
stat	See ggplot2 layer
position	See ggplot2 layer
na.rm	See ggplot2 layer
show.legend	See ggplot2 layer
inherit.aes	See ggplot2 layer
...	other arguments passed on to layer.

Aesthetics

geom_timeline_label undertands the following aesthetics (required aesthetics are in bold):

• x: recommend DATE

• label: recommend LOCATION_NAME

• magnitude: recommend EQ_PRIMARY

• y: recommend COUNTRY

• n_max: default 5. Top n earthquakes to label, sorted by magnitude.

• color

• linetype

• size

• alpha

Examples

library(dplyr); library(ggplot2)
quakes <- eq_load_clean_data()

quakes %>%
  dplyr::filter(COUNTRY %in% c('USA', 'UK')) %>%
  dplyr::filter(DATE > '2000-01-01') %>%
  ggplot() +
  geom_timeline(aes(x = DATE, y = COUNTRY, color = TOTAL_DEATHS,
                    size = EQ_PRIMARY)) +
  geom_timeline_label(aes(x = DATE, y = COUNTRY, magnitude = EQ_PRIMARY,
                         label = LOCATION_NAME, n_max = 5)) +
  scale_size_continuous(name = 'Richter scale value') +
  scale_color_continuous(name = '# of Deaths') +
  theme_eq()

DYZI/Earthquake documentation built on May 7, 2019, 6:54 p.m.