fars_map_state: Map accidents
In CorradoLanera/weektwo: Course: Building R Packages, week 2

Description Usage Arguments Details Value Examples

Plot the point map for the fars record of the STATE corresponding to the state.num and the year provided

1	fars_map_state(state.num, year, path = ".")

`state.num`	(num) An integer (or something cohercible to it) representing a STATE number into the fars data.
`year`	(num) The year of the interested fars file.
`path`	(chr) path to the fars file

if no accident happen in the state and period selected a message will be throw and NULL is returned.

If a plot is returned, it will be drawn only for longitude not greater than 900 and latidude not grater than 90.

NULL (with a message) if the STATE represented by the state.num provided has no records in fars for the year selected. Otherwhise, a plot with the geographical point for its fars is produced and nothing will be returned.

## Not run: 
    file_path <- system.file("tests", "testthat",
        package = "weektwo"
    )

    fars_map_state(1, 2013, path = file_path)
    fars_map_state(1, 2012, path = file_path) # error
    fars_map_state(2, 2015, path = file_path) # nothing to drawn

## End(Not run)