slopegraph: Edward Tufte-Inspired Slopegraphs

#' Modified by Chuck to correct broken alias as well as upload correct cancer2.RData file
#' @rdname cancer
#' @title Estimates of relative survival rates, by cancer site
#' @aliases cancer
#' @description Cancer survival rates for 5, 10, 15, and 20 years for twenty-four cancer sites.
#' @format
#' A data frame containing twenty-four observations for four years.
#' 
#' @source Edward Tufte. \emph{Beautiful Evidence}. Graphics Press, 174-176.
#' @keywords datasets
"cancer"

#' @rdname cancer2
#' @title Estimates of relative survival rates, by cancer site (long)
#' @aliases cancer2
#' @description Cancer survival rates for 5, 10, 15, and 20 years for twenty-four cancer sites.
#' @format
#' A data frame containing twenty-four observations for four years.
#' 
#' @source Edward Tufte. \emph{Beautiful Evidence}. Graphics Press, 174-176.
#' @keywords datasets
"cancer2"

#' @title Current receipts of government as a percentage of Gross Domestic Product, 1970 and 1979
#' @aliases gdp
#' @description Current receipts of fifteen national governments as a percentage of gross domestic product
#' @format
#' A data frame containing fifteen country observations for two years.
#' 
#' @source Edward Tufte. \emph{Beautiful Evidence}. Graphics Press, 174-176.
#' @keywords datasets
"gdp"

#' @title U.S. State Populations
#' @aliases states
#' @description The relative rank of U.S. state populations for nine decades (1790-1870).
#' @format
#' A data frame containing twenty-four observations for four years.
#' 
#' @source Gray, Ormando Willis, and Colton, G. Woolworth. 1878. ``Chart Exhibiting the Relative Rank of the States for Nine Decades (1790-1870).'' Philadelphia: O.W. Gray & Son. Dataset constructed from slopegraph shown here: \url{http://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~207741~3003452:Chart-Exhibiting-the-Relative-Rank-}
#' @keywords datasets
"states"

#' @title US Bachelors Degrees
#' @aliases bachelors
#' @description Bachelor's degrees conferred by postsecondary institutions, by field of study: Selected years, 1970-71 through 2013-14
#' @format
#' A data frame containing thirty-three observations for nineteen years.
#' 
#' @source  U.S. Department of Education, National Center for Education Statistics, Higher Education General Information Survey (HEGIS), \dQuote{Degrees and Other Formal Awards Conferred} surveys, 1970-71 through 1985-86; Integrated Postsecondary Education Data System (IPEDS), \dQuote{Completions Survey} (IPEDS-C:91-99); and IPEDS Fall 2000 through Fall 2014, Completions component. Retrieved 2016-12-08 from \url{http://nces.ed.gov/programs/digest/d15/tables/dt15_322.10.asp}.
#' @keywords datasets
"bachelors"