Each visual variable (e.g. fill in tm_polygons()) has an additional .chart argument via which charts can be shown:
We can update the position of the chart to bottom right (in a separate frame). See vignette about positioning.
Or, in case we would like the chart to be next to the legend, but in a different frame:
tm_shape(World) +
tm_polygons(
fill = "press",
fill.scale = tm_scale_intervals(n=10, values = "scico.hawaii"),
fill.legend = tm_legend("World Press\nFreedom Index", group.frame = FALSE),
fill.chart = tm_chart_bar(position = tm_pos_out("center", "bottom", align.v = "top"))) +
tm_layout(component.stack_margin = .5) +
tm_crs("auto")
#> Warning: Component group arguments, such as `group.frame`, are deprecated as of 4.1.
#> Please use `group_id = "ID"` in combination with `tm_components(frame_combine =
#> FALSE)` instead.RetroSearch is an open source project built by @garambo | Open a GitHub Issue
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