call_census_api: Retrieve data from the Census API
In censusr: Collect Data from the Census API

Returns Census data for the 2010 SF1 or ACS 2013-2015 1-, 3-, and 5-Yr aggregations for requested variables and geographies.

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call_census_api(variables_to_get, names = NULL, geoids, allgeos = NULL,
  data_source = c("sf1", "acs"), year = 2013, period = 5,
  api_key = NULL)

`variables_to_get`	A character vector of the desired variable names for the Census API call, defined at https://www.census.gov/data/developers/data-sets.html
`names`	A character vector of the same length as `variables_to_get` giving the user-defined names for the variables (optional). Defaults to raw API names.
`geoids`	A character vector of FIPS codes; must be at least to the county (5-digit) level, and can accept down to blocks (15-digit).
`allgeos`	(optional) A string identifying the type of geography for which to collect data within the the requested `geoids`. Must be one of `c('co', 'tr', 'bg', 'bl')`. For instance, if `allgeos = "bg"`, will return all block groups within the given `geoids`.
`data_source`	A string identifying whether the SF1 (decennial census) or ACS data is desired.
`year`	If `data_source = "acs"`, the final year of the summary period. Default is `2013`.
`period`	If `data_source = "acs"`, the length of aggregation period. Default is `5`, or a 5-year aggregation table.
`api_key`	The user's Census API key (as a character string). You can get a free key from [Census](http://api.census.gov/data/key_signup.html). See `vignette('censusr', package = 'censusr')` to setup a default key as an environment variable.