sphet (version 1.6)

dist_functions: Distance measures available in distance

Description

The great circle distance is calculated by the function rdist.earth in library fields.

Details

The distance measures implemented in sphet are:

• 'euclidean': $\sqrt{\sum{(x_i - y_i)^2}}$
• 'chebyshev': $max(|x_i - y_i|)$
• 'braycur': $ \frac{\sum{|x_i - y_i|}}{\sum{|x_i + y_i|}}$
• 'canberra': $ \frac{\sum{|x_i - y_i|}}{\sum{|x_i| + |y_i|}} $
• 'gcircle': see spDists, which uses an approximation to the WGS84 spheroid.

See Also

gstslshet, distance, distance