Legend charts are small charts that are added to the map, usually in addition to legends.
Usage
tm_chart_histogram(
breaks,
plot.axis.x,
plot.axis.y,
extra.ggplot2,
position,
width,
height,
stack,
z,
group.frame,
resize_as_group
)
tm_chart_bar(
plot.axis.x,
plot.axis.y,
extra.ggplot2,
position,
width,
height,
stack,
z,
group.frame,
resize_as_group
)
tm_chart_donut(position, width, height, stack, z, group.frame, resize_as_group)
tm_chart_violin(
position,
width,
height,
stack,
z,
group.frame,
resize_as_group
)
tm_chart_box(position, width, height, stack, z, group.frame, resize_as_group)
tm_chart_none()
tm_chart_heatmap(
position,
width,
height,
stack,
z,
group.frame,
resize_as_group
)
Arguments
- breaks
The breaks of the bins (for histograms)
- plot.axis.x, plot.axis.y
Should the x axis and y axis be plot?
- extra.ggplot2
Extra ggplot2 code
- position
Position of the chart. An object created with
tm_pos_in()
ortm_pos_out()
. Or, as a shortcut, a vector of two values, specifying the x and y coordinates. The first is"left"
,"center"
or"right"
(or upper case, meaning tighter to the map frame), the second"top"
,"center"
or"bottom"
. Numeric values are also supported, where 0, 0 means left bottom and 1, 1 right top. See also vignette about positioning.- width
in number of text lines (height of it)
- height
in number of text lines
- stack
stack with other map components, either
"vertical"
or"horizontal"
.- z
stacking order
- group.frame
group.frame
- resize_as_group
resize_as_group
Details
Note that these charts are different from charts drawn inside the map. Those are called glyphs (to be implemented).
Examples
tm_shape(World) +
tm_polygons("HPI",
fill.scale = tm_scale_intervals(),
fill.chart = tm_chart_histogram())