Description Usage Arguments Details Value References Examples
Calculates the minimum spanning tree distance, in kilometers, using Prim's Algorithm [1] and a previously calculated pairwsie distance matrix
1 | MSTDist_FromMat(longs, lats, DistMat)
|
longs |
- Longitudinal occurrences in decimal degrees |
lats |
- Latitudinal occurrences in decimal degrees |
DistMat |
- Pairwsie distance matrix of coordinates, from the PWMatrix() function |
Uses Prim's algorithm for finding the minimum spanning tree
Returns the minimum spanning tree distance in kilometers, the pairwise distance matrix of occurrences, the order points were connected in, and a 2-column array of coordinates
[1] Prim, R.C. 1957. Shortest Connection Networks and Some Generalizations. The Bell System Technical Journal 36:1389-1401.
1 2 | MSTCalc<-MSTDist(longs=c(22,44,-12,67),lats=c(-77,56,22,56))
MSTDist_FromMat(MSTCalc$Longitude,MSTCalc$Latitude,MSTCalc$MST_DistMat)
|
Warning messages:
1: In min(c(NA_real_, NA_real_, NA_real_, NA_real_), na.rm = TRUE) :
no non-missing arguments to min; returning Inf
2: In min(c(NA_real_, NA_real_, NA_real_, NA_real_, NA_real_, NA_real_, :
no non-missing arguments to min; returning Inf
$MST_km
[1] 18552.83
$MST_DistMat
X1 X2 X3 X4
1 NA 11216.01 5908.434 7329.294
2 NA NA 14839.481 15089.651
3 NA NA NA 1428.389
4 NA NA NA NA
$MST_pt_connects
[1] 2 1 1 3 3 4
$Longitude
[1] -12 22 44 67
$Latitude
[1] 22 -77 56 56
Warning messages:
1: In min(c(NA_real_, NA_real_, NA_real_, NA_real_, NA_real_, NA_real_, :
no non-missing arguments to min; returning Inf
2: In min(c(NA_real_, NA_real_, NA_real_, NA_real_, NA_real_, NA_real_, :
no non-missing arguments to min; returning Inf
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