choropleth_ggplot2 | R Documentation |
Creates a choropleth map from an object of class sf
.
If the chosen variable can be classified into discrete intervals using
Fisher's natural breaks, the polygons are shaded by cluster. Otherwise,
the variable is visualized on a continuous scale.
choropleth_ggplot2(
sf_object,
value = output,
n = 7,
dig.lab = 2,
legend_title = "Class",
option = "D",
direction = 1
)
sf_object |
An object of class |
value |
Column in |
n |
Integer. Number of clusters to use in Fisher classification (default = 7). |
dig.lab |
Integer. Number of digits to display in legend labels (default = 2). |
legend_title |
Character. Title for the legend (default = "Class"). |
option |
Character string indicating the colormap option passed to
|
direction |
Numeric. Order of colors in the scale.
If |
The function first attempts to classify the chosen variable into
n
clusters using Fisher's natural breaks
(classInt::classIntervals()
). If this fails (e.g. due to insufficient
unique values), the function falls back to a continuous scale.
A ggplot
object containing the choropleth map.
Martin Haringa
test <- points_to_polygon(
nl_postcode2,
insurance,
sum(amount, na.rm = TRUE)
)
choropleth_ggplot2(test, value = output)
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