+-------------+-------------------+
| Lifeboats   | R Documentation   |
+-------------+-------------------+

Lifeboats on the Titanic
------------------------

Description
~~~~~~~~~~~

Data from Mersey (1912) about the 18 (out of 20) lifeboats launched
before the sinking of the S. S. Titanic.

Usage
~~~~~

::

    data("Lifeboats")

Format
~~~~~~

A data frame with 18 observations and 8 variables.

launch
    launch time in ``"POSIXt"`` format.

side
    factor. Side of the boat.

boat
    factor indicating the boat.

crew
    number of male crew members on board.

men
    number of men on board.

women
    number of women (including female crew) on board.

total
    total number of passengers.

cap
    capacity of the boat.

Source
~~~~~~

M. Friendly (2000), Visualizing Categorical Data:
`http://euclid.psych.yorku.ca/ftp/sas/vcd/catdata/lifeboat.sas <http://euclid.psych.yorku.ca/ftp/sas/vcd/catdata/lifeboat.sas>`_

References
~~~~~~~~~~

L. Mersey (1912), Report on the loss of the “Titanic” (S. S.).
Parliamentary command paper 6452.

M. Friendly (2000), *Visualizing Categorical Data*. SAS Institute, Cary,
NC.

Examples
~~~~~~~~

::

    data("Lifeboats")
    attach(Lifeboats)
    ternaryplot(
      Lifeboats[,4:6],
      pch = ifelse(side == "Port", 1, 19),
      col = ifelse(side == "Port", "red", "blue"),
      id  = ifelse(men / total > 0.1, as.character(boat), NA),
      prop_size = 2,
      dimnames_position = "edge",
      main = "Lifeboats on the Titanic"
    )
    grid_legend(0.8, 0.9, c(1, 19), c("red", "blue"),
      c("Port", "Starboard"), title = "SIDE")
    detach(Lifeboats)

