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I am using addLegend() in leaflet in R. My labels have minus signs in them. Is there an easy way to remove the dashes that come with numeric colour palettes to improve the formatting? labFormat doesn't seem to have such an option.

enter image description here

Samuel Crew
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1 Answers1

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Can you take a look at addLegendNumeric in the leaflegend package ? It has the option to set tickWidth = 0 and tickLength=0 which make dashes (tickmarks) disappear.

You can read about leaflegend here: https://roh.engineering/posts/2021/02/introduction-to-leaflegend/

In the example for addLegendNumeric the author didn't include these two parameters, but you can try them for yourself.

Example code:

library(leaflet)

data(quakes)

# Numeric Legend

numPal <- colorNumeric('viridis', quakes$depth)
leaflet() %>%
  addTiles() %>%
  addLegendNumeric(
    pal = numPal,
    values = quakes$depth,
    position = 'topright',
    tickLength = 0,
    tickWidth = 0,
    title = htmltools::tags$div('addLegendNumeric (Decreasing)',
                                style = 'font-size: 24px; text-align: center; margin-bottom: 5px;'),
    orientation = 'vertical',
    shape = 'stadium',
    decreasing = TRUE,
    height = 100,
    width = 20,
    bins = 4)

image on quakes dataset

lpdoan
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