Computes several quality measures on a trained GeoSOM.This function is a wrapper
of aweSOM::somQuality().
Arguments
- gsom
A
kohonenobject,get fromgeosom().
Value
A list containing quality measures : quantization error, share of explained variance, topographic error and Kaski-Lagus error.
Author
Wenbo Lv lyu.geosocial@gmail.com
Examples
data(pmc)
set.seed(2004)
g = geosom(data = pmc, coords = c("centroidx","centroidy"),
wt = 3,grid = geosomgrid(6,10),normalize = TRUE)
geosom_quality(g)
#>
#> ## Quality measures:
#> * Quantization error : 6.549047
#> * (% explained variance) : 45.23
#> * Topographic error : 0.7158273
#> * Kaski-Lagus error : 5.257759
#>
#> ## Number of obs. per map cell:
#> 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
#> 4 8 7 4 4 14 6 3 3 3 4 5 4 3 3 3 2 7 3 2 4 2 5 5 4 3
#> 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52
#> 4 4 4 5 5 3 5 4 1 3 8 5 4 4 3 4 8 4 3 3 5 5 6 6 6 5
#> 53 54 55 56 57 58 59 60
#> 5 3 10 5 7 4 5 7