How to use Leaflet Plugins in RStudio

Jmiller · April 24, 2019, 4:54pm

I am fairly new when it comes to leaflet and R. I am able to fully create my maps and get them to work, for the most part. Where I am starting to stumble is when it comes to certain plug-ins.

I followed these directions

gist.github.com

https://gist.github.com/jcheng5/c084a59717f18e947a17955007dc5f92

README.md

## Using arbitrary Leaflet JS plugins with Leaflet for R

The [Leaflet](http://leafletjs.com) JS mapping library has lots of plugins available. The [Leaflet package for R](http://rstudio.github.io/leaflet/) provides direct support for some, but far from all, of these plugins, by providing R functions for invoking the plugins.

If you as an R user find yourself wanting to use a Leaflet plugin that isn't directly supported in the R package, you can use the technique shown here to load the plugin yourself and invoke it using JS code.

leaflet-esri.R

library(leaflet)
library(htmltools)
library(htmlwidgets)

# This tells htmlwidgets about our plugin name, version, and
# where to find the script. (There's also a stylesheet argument
# if the plugin comes with CSS files.)
esriPlugin <- htmlDependency("leaflet.esri", "1.0.3",
  src = c(href = "https://cdn.jsdelivr.net/leaflet.esri/1.0.3/"),
  script = "esri-leaflet.js"

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leaflet-heat.R

# This example shows the ability to pass extra R data to onRender.
# At the time of this writing it requires a custom build of htmlwidgets:
# devtools::install_github("ramnathv/htmlwidgets@joe/feature/onrender-data")
#
# Track the progress of this functionality at
# https://github.com/ramnathv/htmlwidgets/pull/202

library(leaflet)
library(htmltools)
library(htmlwidgets)

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and I was able to get the leaflet-easyPrint to kind of work but if I want to use

it doesn't work at all, and I don't get any errors to try and troubleshoot.

I have 9 different groups of polygons and they are formatted with color palettes based on data values. What my end goal would be is where my layer control is laid out like

Group A
- 12 Month
- 36 Month
- YTD
Group B
- 12 Month
- 36 Month
- YTD
Group C
- 12 Month
- 36 month
- YTD

And then they can only select one like you can set it up like baselayer in the build in layer control.

Does anyone have any experience or advice? I have googled and searched but am not finding anything overly helpful.

harryzhu · April 25, 2019, 5:19am

@Jmiller
you can see the most of leaflet plugins in here:

Jmiller · April 25, 2019, 11:55am

@harryzhu
Thank you for the reply. I had actually looked at that GitHub page before making my post. It does have a lot of plugins listed. My issue isn't with finding the plugins though, it is how do I incorporate them into RStudio and have them work properly.

system · May 17, 2019, 9:28am

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