geom_timeline: Time line of earthquakes

In sheila-NAA/Mastering-software-development: Cleaning Raw Data

Description

geom_timeline return a layer representing a time line of earthquakes, i.e. a time line over which there are a point for each earthquake.

Usage

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

Arguments

mapping	Set of aesthetic mappings created by aes() or aes_(). If specified and inherit.aes = TRUE (the default), it is combined with the default mapping at the top level of the plot. You must supply mapping if there is no plot mapping.
data	The data to be displayed in this layer. There are three options: If NULL, the default, the data is inherited from the plot data as specified in the call to ggplot(). A data.frame, or other object, will override the plot data. All objects will be fortified to produce a data frame. See fortify() for which variables will be created. A function will be called with a single argument, the plot data. The return value must be a data.frame, and will be used as the layer data. A function can be created from a formula (e.g. ~ head(.x, 10)).
stat	The statistical transformation to use on the data for this layer, as a string.
position	Position adjustment, either as a string, or the result of a call to a position adjustment function.
show.legend	logical. Should this layer be included in the legends? NA, the default, includes if any aesthetics are mapped. FALSE never includes, and TRUE always includes. It can also be a named logical vector to finely select the aesthetics to display.
inherit.aes	If FALSE, overrides the default aesthetics, rather than combining with them. This is most useful for helper functions that define both data and aesthetics and shouldn't inherit behaviour from the default plot specification, e.g. borders().
...	further arguments passed to the geom layer
na.rm	(lgl, default = FALSE) remove missing data?

Details

Aesthetics: geom_timeline understands the following aesthetics (required in bold):

• x: (Date) of earthquakes

• y: (factr) stratification. If present multiple time lines will be plotted for each level of the factor (e.g. country).

• colour: of the points

• size: of the points

• alpha: trasparency for the points

• fill

• linetype

• linesize

• fontsize

• stroke

Examples

## Not run: 
    library(dplyr)
    library(lubridate)
    library(ggplot2)

    library(devrcap)
        data(noaa)

    noaa %>%
        eq_clean_data() %>%
        filter(
            country %in% c("ITALY", "GREECE", "PORTUGAL"),
            year(date) >= 1900
        ) %>%
        ggplot(aes(
            x = date,
            y = country,
            size   = eq_primary,
            colour = log(total_deaths)
        )) +
        geom_timeline()

## End(Not run)

sheila-NAA/Mastering-software-development documentation built on Dec. 23, 2021, 1:22 a.m.