Local Neighbor Match Test

The local neighbor match test (2020) is a method to identify significant locations by assessing the extent of overlap between k-nearest neighbors in geographical space and k-nearest neighbors in multi-attribute space. For more information, please read https://geodacenter.github.io/workbook/6c_local_multi/lab6c.html#local-neighbor-match-test

neighborMatchTest()

function neighborMatchTest(
    String map_uid,
    Number knn,
    Array val,
    String scale_method, 
    String distance_method,
    Number power, 
    Boolean is_inverse,
    Boolean is_arc,
    Boolean is_mile)

Arguments

Name	Type	Description
map_uid	String	the unique map id
k	Number	k nearest neighbor for both attribute and geographical space
vals	Array	an array of numeric columns that contains the values for neighbor match test
scale_method	String	the scaling method. Options are {'raw', 'standardize', 'demean', 'mad', 'range_standardize', 'range_adjust'}. Default: 'standardize'
distance_method	String	the distance method. Options are {'euclidean', 'manhattan'. Default: 'euclidean'.
power	Number	the power/exponent corresponds to the number of times the base (dist_band) is used as a factor. Default: 1.
is_inverse	Boolean	if apply inverse on distance value. Default: False.
is_arc	Boolean	if compute arc distance between two observations. Default: FALSE.
is_mile	Boolean	if convert distance unit from mile to kilometer(KM). Default: TRUE.

Return

Type	Description
Object	An object with two keys: {'cardinality', 'probability'}

Try it yourself in the playground (jsgeoda + deck.gl):