Add matched-null validation for cluster counts - #938
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Closes easystats/easystats#479.
This adds
test_clusters(), which compares a selected cluster count with counts from matched-null data generated bymatchednull. The default pipeline standardizes the data and usesmclust::Mclust()to select the number of components by BIC; custom scalar-returning clustering functions are also supported.The public API keeps the main controls explicit, while options such as the copula and parallel evaluation can be passed through
...tomatchednull::matched_null_test().I added tests for custom functions, reproducibility, null and positive controls, argument forwarding, and input validation.
lintrpassed