dplyr (version 0.5.0)

lahman: Cache and retrieve an src_sqlite of the Lahman baseball database.

Description

This creates an interesting database using data from the Lahman baseball data source, provided by Sean Lahman at http://www.seanlahman.com/baseball-archive/statistics/, and made easily available in R through the Lahman package by Michael Friendly, Dennis Murphy and Martin Monkman. See the documentation for that package for documentation of the inidividual tables.

Usage

lahman_sqlite(path = NULL)
lahman_postgres(dbname = "lahman", ...)
lahman_mysql(dbname = "lahman", ...)
lahman_df()
lahman_dt()
copy_lahman(src, ...)
has_lahman(type, ...)
lahman_srcs(..., quiet = NULL)

Arguments

...

Other arguments passed to src on first load. For mysql and postgresql, the defaults assume you have a local server with lahman database already created. For lahman_srcs, character vector of names giving srcs to generate.

type

src type.

quiet

if TRUE, suppress messages about databases failing to connect.

Examples

# Connect to a local sqlite database, if already created

if (has_lahman("sqlite")) {
  lahman_sqlite()
  batting <- tbl(lahman_sqlite(), "Batting")
  batting
}

# Connect to a local postgres database with lahman database, if available
if (has_lahman("postgres")) {
  lahman_postgres()
  batting <- tbl(lahman_postgres(), "Batting")
}