Points in a scatterplot with individual ellipses using ggplot2 in R

Question

My dataset is formed by 4 columns, as shown below:

The two columns on the left represent the coordinates XY of a geographical structure, and the two on the left represent the size of "each" geographical unit (diameters North-South and East-West)

I would like to graphically represent a scatterplot where to plot all the coordinates and draw over each point an ellipse including the diameters of each geographical unit.

Manually, and using only two points, the image should be like this one:

How can I do it using ggplot2?

You can download the data here

Answer 1

Use geom_ellipse() from ggforce:

library(ggplot2)
library(ggforce)

d <- data.frame(
  x = c(10, 20),
  y = c(10, 20),
  ns = c(5, 8),
  ew = c(4, 4)
)

ggplot(d, aes(x0 = x, y0 = y, a = ew/2, b = ns/2, angle = 0)) + 
  geom_ellipse() +
  coord_fixed()

^{Created on 2019-06-01 by the reprex package (v0.2.1)}