title: How Do I connect two coordinates with a line using Leaflet in R
body: <p>I am trying to use Leaflet package in R to draw a amp and connect the markers given the latitude and longitude information in the table below.</p>
  
  <pre>
  
      | Observation | InitialLat | InitialLong | NewLat    | NewLong   |
      |-------------|------------|-------------|-----------|-----------|
      | A           | 62.469722  | 6.187194    | 51.4749   | -0.221619 |
      | B           | 48.0975    | 16.3108     | 51.4882   | -0.302621 |
      | C           | 36.84      | -2.435278   | 50.861822 | -0.083278 |
      | D           | 50.834194  | 4.298361    | 54.9756   | -1.62179  |
      | E           | 50.834194  | 4.298361    | 54.9756   | -1.62179  |
      | F           | 50.834194  | 4.298361    | 51.4882   | -0.302621 |
      | G           | 47.460427  | -0.530804   | 51.44     | -2.62021  |
      | H           | 51.5549    | -0.108436   | 53.4281   | -1.36172  |
      | I           | 51.5549    | -0.108436   | 52.9399   | -1.13258  |
      | J           | 51.5549    | -0.108436   | 51.889839 | -0.193608 |
      |             | 51.5549    | -0.108436   | 52.0544   | 1.14554   |
  
  </pre>
  
  <p>I want to draw lines from an initial point given by the coordinates in the <code>InitialLat</code> and <code>InitialLong</code> columns to an end point given by the <code>NewLat</code> and <code>NewLong</code> columns.</p>
  
  <p>Here is my current R code which only draws the markers on the map.</p>
  
  <pre>
  
      library(leaflet)
      map3 = leaflet(data) %>% addTiles()
      map3 %>% addMarkers(~InitialLong,~InitialLat, popup=~Observation)
  
  </pre>