INNER CODE UNIT · C

j_nn

mlr-org/mlr · src/smote.c:22

    j_nn = nn[j_sel + j_nn * nrow_nn] - 1;
    lambda = unif_rand();
    for (R_len_t col = 0; col < ncol_x; col++) {
      if (isnum[col]) {
        /* do convex combination for numerics */
        res[i + col * nrow_res] = lambda * x[j_sel + col * nrow_x] +  (1 - lambda) * x[j_nn + col * nrow_x];
      } else {
        /* for factors we sample a level from x1 or x2 */
        if (lambda < 0.5)
          lev = x[j_sel + col * nrow_x];
        else
          lev = x[j_nn + col * nrow_x];
        res[i + col * nrow_res] = lev;
      }
    }
  }
  PutRNGstate();
  return s_res;

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