plot numbers on a map from an sf object

I am trying to plot a map with a number (wind velocity) instead of a symbol in each point with data, something like

which I produced with a GIS app

The thing is I have the plotted numbers in an sf object, this way

the numbers are in the variable called Rmax

I have tried with plot(points['Rmax'])

But obviously it does nor work, it just plot symbols, no the numbers

Any idea?

thanks a lot in advance, Ramón

There are a lot of ways to achieve this.

If you want to do this in base R you can use plot and text like so:

library(sf)

# Some coordinates in Rome in WGS84
coords <- data.frame(
  lon = c(12.4964, 12.5113, 12.5002),  #Longitude
  lat = c(41.9028, 41.8919, 41.9134)   #Latitude
)

# Create an sf table 
data <- st_as_sf(coords, coords = c("lon", "lat"), crs = 4326)

# Add some wind speeds
data$wind_speed <- c(10, 15, 17.5)

# Create a base plot with the points
plot(st_geometry(data), type = "p")

# Extract coordinates from sf object
coords <- st_coordinates(data)

# Add numbers to the plot
text(coords[,1], coords[,2], labels = data$wind_speed, pos = 3)

However, if you want an interactive scrollable map you can use the leaflet library for example like so:

library(leaflet)

leaflet(data = data) %>%
  addTiles() %>% # Add a background map
  addCircleMarkers(label = ~as.character(wind_speed), labelOptions = list(permanent = T), radius = 10) # Add the circle markers with a label

use ?addCircleMarkers and ?labelOptions to check out the documentation on how to style your labels.