Calculate a distance vector(matrix) between any Geographically Weigthed (GW) model calibration point(s) and the data points.
Focus
: an integer, indexing to the current GW model
point, if focus=0, all the distances between all the GW model
calibration points and data points will be calculated and a distance
matrix will be returned; if 0<focus<length(number of data points),
then the distances between the ’focus’th GW model points and data points
will be calculated and a distance vector will be returned
Power
: the power of the Minkowski distance,default is 2,
i.e. the Euclidean distance.
Figure 1. Minkowski distance
Theta (Angle in radians)
: an angle in radians to rotate
the coordinate system, default is 0
longlat
: if TRUE, great circle distances will be
calculated
After loading data, to generate the distance matrix, you must select the appropriate arguments (focus, power, and theta, longlat) and click on the Run button.
Returns a numeric distance matrix or vector (if focus > 0); matrix with its rows corresponding to the observations and its columns corresponds to the GW model calibration points.
Gollini, I., Lu, B., Charlton, M., Brunsdon, C., & Harris, P. (2015). GWmodel: An R Package for Exploring Spatial Heterogeneity Using Geographically Weighted Models. Journal of Statistical Software, 63(17), 1–50. https://doi.org/10.18637/jss.v063.i17