relational.clustering {fossil} | R Documentation |
A method to cluter a number of samples using a relational (dissimila
relational.clustering(dist, clusters = 2)
dist |
pairwise distance matrix |
clusters |
number of clusters required |
This function will calculate the shortest distance (portion of a Great Circle) in kilometers between two points on the Earth given their latitude and longitude.
Arc distance between two points on the Earth's surface in kilometers.
The distance calculated may be up to 0.2% inaccurate, as this function treats the Earth as a sphere with a circumference of 40003 km, rather than an ellipsoid like it actually is.
Matthew Vavrek
The formulas for the Haversine distance function were taken from the Dr. Math website at http://mathforum.org/library/drmath/view/55417.html
To calculate pairwise distances between a list of points see earth.dist
, or to calculate an area enclosed by three points on the Earth's surface, see earth.tri
##distance between 23 degrees N 54 degrees E and 32 degrees S 67 degrees E
deg.dist(23,54,-32,67)