In time: I found that the values in my Z matrix is in fact the 2-norm (or Euclidean distance) between all my 399 points. But how can I convert them to km? Only with haversine formula?
How to calculate the Euclidean distance beetwen all points of Latitude Longitude pairs?
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David Franco on 20 Apr 2020
Answered: David Franco on 21 Apr 2020
I have a 399 cities array with LON LAT coordinates (first column for the Longitudes), like the picture below.
How can I calculate the 399x399 matrix with all distances between this 399 cities?
I used pdist and squareform but the result are small number. Am I correct?
D = pdist(XY);
Z = squareform(D);
For example, the two first points (-50.3125 -23.3005; -48.9918 -24.6617) have a Euclidean distance between them of 216 km (see picture below).
Geoff Hayes on 21 Apr 2020
David - yes, Haversine is one way to get the distance between two latitude and longitude points. The Vincenty algorithm (see https://www.mathworks.com/matlabcentral/fileexchange/5379-geodetic-distance-on-wgs84-earth-ellipsoid) is another..
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