Legend for topogram widget — topogram

Add a gradient legend in a topogram() widget.

Usage

topogram_legend(
  topo,
  colors = NULL,
  labels = NULL,
  formatter = NULL,
  title = NULL,
  direction = c("h", "v"),
  height = "250px",
  width = "250px"
)

Arguments

topo: A topogram() / topogram_proxy() htmlwidget object.
colors: Vector of colors used in legend, default is to use colors used in topogram().
labels: Labels to display for values, default is to use range of values used in topogram().
formatter: Function to format labels, like scales::label_number().
title: Title for the legend.
direction: Direction: horizontal or vertical.
height, width: Height, width for legend. For gradient legend it represent the size of the dradient according to direction.

Value

A topogram() / topogram_proxy()htmlwidget object.

Examples

library(topogram)

topogram(world, value = "pop_est") %>% 
  topogram_legend(title = "Population")
#> Warning: 'geojsonlint' not installed, skipping GeoJSON linting

  
    
    
  
  
  
  


topogram(world, value = "pop_est", palette = "Blues") %>% 
  topogram_legend(
    title = NULL,
    formatter = scales::label_comma(),
    direction = "v"
  )
#> Warning: 'geojsonlint' not installed, skipping GeoJSON linting