ensure

Name of the dataframe
Stops in the case of an error

name

ensure() returns the dataframe (or tibble), reading it in if necessary

A simple interface to the Geographic Header information
from the "2010 US Census Summary File 2". The entire Summary File 2
is described at
<https://catalog.data.gov/dataset/census-2000-summary-file-2-sf2>,
but note that this package only provides access to parts of the
geographic header ('geoheader') of the file. In particular, only
the first 101 columns of the geoheader are included and, more
importantly, only rows with summary levels (SUMLEVs) 010 through 050
(nation down through county level) are included. In addition to
access to (part of) the geoheader, the package also provides a
decode function that takes a column name and value and, for certain
columns, returns "the meaning" of that column (i.e., a "SUMLEV"
value of 40 means "State"); without a value, the decode function
attempts to describe the column itself.

Greg Minshall

ensure: (internal) Make Sure a Dataframe Exists

Description

Usage

Arguments

Value

Details