Animate map in R with leaflet and xts - r

Question

I would like to build an animated map with a time cursor in R.
I have time series (xts) that I would like to represent on map.
library(xts)
library(leaflet)
date<-seq(as.POSIXct("2015-01-01"), as.POSIXct("2015-01-10"), by=86400)
a<-xts(1:10,order.by=date)
b<-xts(5:14,order.by=date)
df = data.frame(Lat = 1:10, Long = rnorm(10),Id=letters[1:10])
leaflet() %>% addCircles(data = df,popup =df$Id)
#popup =paste(df$Id, xts value) time cursor on the map
Is there a way to do this with the leaflet package?
I didn't try rmaps package yet.
Thanks
EDIT:https://github.com/skeate/Leaflet.timeline

Answer 1

There is a simple example
Library:
library(shiny)
library(xts)
library(leaflet)
library(dplyr)
Data:
date<-seq(as.Date("2015-01-01"), as.Date("2015-01-10"), by="day")
a<-xts(1:10,order.by=date)
df = data.frame(Lat = rnorm(1)+10, Long = rnorm(1),Id=a)
data_a<-data.frame(a)
data_a1<-data_a %>%
mutate("Lat" =as.numeric(df[1,1]),"Long"=as.numeric(df[2,1]),"Date"=rownames(data_a))
shinyapp:
ui <- fluidPage(
sliderInput("time", "date",min(date),
max(date),
value = max(date),
step=1,
animate=T),
leafletOutput("mymap")
)
server <- function(input, output, session) {
points <- reactive({
data_a1 %>%
filter(Date==input$time)
})
output$mymap <- renderLeaflet({
leaflet() %>%
addMarkers(data = points(),popup=as.character(points()$a))
})
}
shinyApp(ui, server)

Answer 2

If you add the following in the formula above, you can see the tiles
#in data
tilesURL <- "http://server.arcgisonline.com/ArcGIS/rest/services/Canvas/World_Light_Gray_Base/MapServer/tile/{z}/{y}/{x}"
#in server replace
output$mymap <- renderLeaflet({
leaflet() %>%
addTiles(tilesURL)%>%
addMarkers(data = points(),popup=as.character(points()$a))
})