Quickly create a choropleth sketch

This is a quick way to create a choropleth sketch of town-, neighborhood-, or tract-level data. Uses a corresponding sf object; as of June 2018, this sf object must be one that ships with this package, or otherwise be globally available.

Usage

quick_map(
  data,
  name = name,
  value = value,
  level = c("town", "neighborhood", "tract"),
  city = NULL,
  n = 5,
  palette = "GnBu",
  title = NULL,
  ...
)

Arguments

data

A data frame containing data by geography.

name

Bare column name of location names to join; defaults name.

value

Bare column name of numeric values to map; defaults value.

level

String giving the desired geographic level; must be one of "town", "neighborhood", or "tract". Defaults "town".

city

If geographic level is neighborhood, string of the corresponding city name to match to a spatial object.

n

Number of breaks into which to bin values; defaults (approximately) 5.

palette

String of a ColorBrewer palette; see RColorBrewer::RColorBrewer() for possible values. Defaults "GnBu".

title

String giving the title, if desired, for the plot.

...

Arguments passed on to ggplot2::geom_sf

mapping

Set of aesthetic mappings created by aes(). If specified and inherit.aes = TRUE (the default), it is combined with the default mapping at the top level of the plot. You must supply mapping if there is no plot mapping.

stat

The statistical transformation to use on the data for this layer. When using a geom_*() function to construct a layer, the stat argument can be used the override the default coupling between geoms and stats. The stat argument accepts the following:

A Stat ggproto subclass, for example StatCount.
A string naming the stat. To give the stat as a string, strip the function name of the stat_ prefix. For example, to use stat_count(), give the stat as "count".
For more information and other ways to specify the stat, see the layer stat documentation.

position

A position adjustment to use on the data for this layer. This can be used in various ways, including to prevent overplotting and improving the display. The position argument accepts the following:

The result of calling a position function, such as position_jitter(). This method allows for passing extra arguments to the position.
A string naming the position adjustment. To give the position as a string, strip the function name of the position_ prefix. For example, to use position_jitter(), give the position as "jitter".
For more information and other ways to specify the position, see the layer position documentation.

na.rm

If FALSE, the default, missing values are removed with a warning. If TRUE, missing values are silently removed.

show.legend

logical. Should this layer be included in the legends? NA, the default, includes if any aesthetics are mapped. FALSE never includes, and TRUE always includes.

You can also set this to one of "polygon", "line", and "point" to override the default legend.

inherit.aes

If FALSE, overrides the default aesthetics, rather than combining with them. This is most useful for helper functions that define both data and aesthetics and shouldn't inherit behaviour from the default plot specification, e.g. borders().

Value

A ggplot

Examples

if (FALSE) { # \dontrun{
tidycensus::get_acs(
    geography = "county subdivision",
    variables = c(median_age = "B01002_001"), state = "09", county = "009"
) |>
    town_names(NAME) |>
    dplyr::filter(NAME %in% regions$`Greater New Haven`) |>
    quick_map(name = NAME, value = estimate, title = "Median age by town, 2017", n = 6)
} # }

Quickly create a choropleth sketch

Usage

Arguments

Value

See also

Examples