bc_date: Package: 'eqplot'

In atibot/eqplot: Visualize the earthquake data

Description

This package will provide tools to visualize the earthquake dataset obtained from the U.S. National Oceanographic and Atmospheric Administration (NOAA) on significant earthquakes around the world. This dataset contains information about 5,933 earthquakes over an approximately 4,000 year time span.

Usage

bc_date(ad)

Arguments

ad	A Date class of mirrored AD date , a positive Date type (e.g. "2001-01-01").

Value

A Date class of BC date, a negative Date type (e.g. "-2001-01-01") corresponding to the mirrored AD date

Note

As this is just an internal function to be used for the other functions, it is not exported.

Source

Dataset NOAA Significant Earthquake Database https://www.ngdc.noaa.gov/nndc/struts/form?t=101650&s=1&d=1 National Geophysical Data Center / World Data Service (NGDC / WDS): Significant Earthquake Database. National Geophysical Data Center, NOAA. doi:10.7289 / V5TD9V7K Get BC date from mirrored AD date: bc_date()

This sub function converts a mirrored AD date to BC date and internally used.

atibot/eqplot documentation built on May 17, 2019, 4 p.m.