Show the value of a geom_point using geom_text

Question

Using this nice code from here:

countries <- structure(list(country = structure(c(5L, 6L, 3L, 4L, 10L, 8L, 
11L, 7L, 1L, 13L, 9L, 12L, 2L), .Label = c(\"A         


        

Answer 1

Try this:

p <- ggplot() + 
  geom_polygon(data=base_world, aes(x=long, y=lat, group=group)) +
  geom_line(data=link1, aes(x=Longitude, y=Latitude), color="blue", size=1) +
  geom_line(data=link2, aes(x=Longitude, y=Latitude), color="green", size=1) +
  geom_point(data=countries, aes(x=Longitude, y=Latitude), colour = "cyan", size=5, alpha=I(0.7)) + #set the color outside of `aes`
  theme(text = element_text(size=20), legend.position="none") +   #remove the legend 
  annotate("text", x = countries$Longitude, y=countries$Latitude, label = countries$Value, hjust = 2, colour = "purple") + 
  annotate("text", x = countries$Longitude, y=countries$Latitude, label = countries$country, hjust = -0.1, colour = "red") #if you also want name of countries

And this would be the plot:

> p

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P.S. I'd prefer annotate over geom_text as a personal preference but if you want to use that then following works (should reference to the data-frame when defining the coordinates):

p+geom_text(aes(label=countries$Value,x=countries$Longitude, y=countries$Latitude),hjust=0, vjust=0) 

You may want to consider using different values since texts may not be legible.

Answer 2

You're missing the data parameter in your geom_text:

p + geom_text(data = countries, aes(label=Value, x=Longitude, y=Latitude), hjust=0, vjust=0)