zoom: Zoom in to a subset of a plot

In ggredist: Scales, Geometries, and Extensions of 'ggplot2' for Election Mapping

Zoom in to a subset of a plot

Description

Provides crop_to() to zoom in to a subset of a data frame, and view_box() to annotate the zoomed-in region on the full plot.

Usage

crop_to(subset, data, ...)

view_box(subset, data)

Arguments

subset	An indexing expression to select rows from data. Tidy-evaluted in the context of data.
data	An sf data frame.
...	Additional arguments passed to coord_sf().

Value

crop_to() returns a coord_sf() object to be added to a ggplot. view_box() returns a geom_rect() layer to be added to a ggplot.

Examples

library(ggplot2)
data(oregon)

ggplot(oregon, aes(fill = ndv / (ndv + nrv))) +
    geom_sf(size = 0) +
    scale_fill_538(name = "") +
    view_box(county == "Multnomah", oregon) +
    theme_map()

ggplot(oregon, aes(fill = ndv / (ndv + nrv))) +
    geom_sf(size = 0) +
    scale_fill_538(name = "") +
    crop_to(county == "Multnomah", oregon) +
    theme_map()

ggredist documentation built on Nov. 5, 2025, 7:19 p.m.