viralx_knn.md
In viralx: Explainers for Regression Models in HIV Research

`viralx_knn()` works

Code
  print(viralx_knn(vip_featured, hiv_data, knn_hyperparameters, vip_train,
    vip_new))
Output
           variable contribution
  1       intercept       447.73
  2   cd_2019 = 169      -104.92
  3 vl_2019 = 11388      -134.62
  4   cd_2021 = 275       -31.26
  5  vl_2021 = 1690        -4.71
  6     vl_2022 = 0         0.97
  7   cd_2022 = 127         0.00
  8      prediction       173.19