title: Converting numeric values of Longitude and Latitude to Spatial Data
body: <p>I have a data frame <code>EuropeanCities</code> of latitude and longitude </p>
  
  <pre><code>Latitude Longitude
  52.00529    4.173965
  51.87938    6.268500
  43.36661    -8.406812
  </code></pre>
  
  <p>Currently these values are of a numeric class however I need to set them to spatial coordinates for spatial data</p>
  
  <p>How do I go about converting the class of these values using the <code>sp</code>function?</p>