The local neighbor match test is to assess the extent of overlap between k-nearest neighbors in geographical space and k-nearest neighbors in multi-attribute space.
neighbor_match_test(
df,
k,
scale_method = "standardize",
distance_method = "euclidean",
power = 1,
is_inverse = FALSE,
is_arc = FALSE,
is_mile = TRUE
)A subset of sf object with selected variables. E.g. guerry[c("Crm_prs", "Crm_prp", "Litercy")]
a positive integer number for k-nearest neighbors searching.
(optional) One of the scaling methods 'raw', 'standardize', 'demean', 'mad', 'range_standardize', 'range_adjust' to apply on input data. Default is 'standardize' (Z-score normalization).
(optional) The type of distance metrics used to measure the distance between input data. Options are 'euclidean', 'manhattan'. Default is 'euclidean'.
(optional) The power (or exponent) of a number says how many times to use the number in a multiplication.
(optional) FALSE (default) or TRUE, apply inverse on distance value.
(optional) FALSE (default) or TRUE, compute arc distance between two observations.
(optional) TRUE (default) or FALSE, convert distance unit from mile to km.
A data.frame with two columns "Cardinality" and "Probability".
library(sf)
guerry_path <- system.file("extdata", "Guerry.shp", package = "rgeoda")
guerry <- st_read(guerry_path)
#> Reading layer `Guerry' from data source
#> `/Users/runner/work/_temp/Library/rgeoda/extdata/Guerry.shp'
#> using driver `ESRI Shapefile'
#> Simple feature collection with 85 features and 29 fields
#> Geometry type: MULTIPOLYGON
#> Dimension: XY
#> Bounding box: xmin: 47680 ymin: 1703258 xmax: 1031401 ymax: 2677441
#> Projected CRS: NTF (Paris) / Lambert zone II
data <- guerry[c('Crm_prs','Crm_prp','Litercy','Donatns','Infants','Suicids')]
nbr_test <- neighbor_match_test(data, 6)
nbr_test
#> Cardinality Probability
#> 1 2 5.263800e-02
#> 2 3 3.743147e-03
#> 3 2 5.263800e-02
#> 4 2 5.263800e-02
#> 5 0 NA
#> 6 1 3.116170e-01
#> 7 1 3.116170e-01
#> 8 2 5.263800e-02
#> 9 3 3.743147e-03
#> 10 1 3.116170e-01
#> 11 3 3.743147e-03
#> 12 2 5.263800e-02
#> 13 1 3.116170e-01
#> 14 1 3.116170e-01
#> 15 0 NA
#> 16 2 5.263800e-02
#> 17 1 3.116170e-01
#> 18 2 5.263800e-02
#> 19 1 3.116170e-01
#> 20 2 5.263800e-02
#> 21 2 5.263800e-02
#> 22 1 3.116170e-01
#> 23 2 5.263800e-02
#> 24 3 3.743147e-03
#> 25 1 3.116170e-01
#> 26 1 3.116170e-01
#> 27 1 3.116170e-01
#> 28 4 1.108168e-04
#> 29 3 3.743147e-03
#> 30 3 3.743147e-03
#> 31 0 NA
#> 32 2 5.263800e-02
#> 33 2 5.263800e-02
#> 34 1 3.116170e-01
#> 35 1 3.116170e-01
#> 36 0 NA
#> 37 1 3.116170e-01
#> 38 0 NA
#> 39 2 5.263800e-02
#> 40 3 3.743147e-03
#> 41 3 3.743147e-03
#> 42 0 NA
#> 43 2 5.263800e-02
#> 44 1 3.116170e-01
#> 45 1 3.116170e-01
#> 46 1 3.116170e-01
#> 47 2 5.263800e-02
#> 48 2 5.263800e-02
#> 49 2 5.263800e-02
#> 50 4 1.108168e-04
#> 51 2 5.263800e-02
#> 52 2 5.263800e-02
#> 53 3 3.743147e-03
#> 54 2 5.263800e-02
#> 55 2 5.263800e-02
#> 56 1 3.116170e-01
#> 57 4 1.108168e-04
#> 58 3 3.743147e-03
#> 59 1 3.116170e-01
#> 60 3 3.743147e-03
#> 61 2 5.263800e-02
#> 62 2 5.263800e-02
#> 63 3 3.743147e-03
#> 64 0 NA
#> 65 3 3.743147e-03
#> 66 3 3.743147e-03
#> 67 0 NA
#> 68 1 3.116170e-01
#> 69 0 NA
#> 70 2 5.263800e-02
#> 71 2 5.263800e-02
#> 72 1 3.116170e-01
#> 73 3 3.743147e-03
#> 74 1 3.116170e-01
#> 75 1 3.116170e-01
#> 76 2 5.263800e-02
#> 77 5 1.151344e-06
#> 78 4 1.108168e-04
#> 79 2 5.263800e-02
#> 80 3 3.743147e-03
#> 81 1 3.116170e-01
#> 82 0 NA
#> 83 0 NA
#> 84 1 3.116170e-01
#> 85 2 5.263800e-02