checkRd: (-1) NbClust.Rd:50: Lost braces; missing escapes or markup?
    50 |       \item \bold{Average} : The distance \eqn{D_{ij}}{D_ij} between two clusters \eqn{C_{i}}{C_i} and \eqn{C_{j}}{C_j} is the mean of the distances between the pair of points {x} and {y}, where \eqn{x \in C_{i}, y \in C_{j}}{x in C_i, y in C_j}.
       |                                                                                                                                                                                 ^
checkRd: (-1) NbClust.Rd:50: Lost braces; missing escapes or markup?
    50 |       \item \bold{Average} : The distance \eqn{D_{ij}}{D_ij} between two clusters \eqn{C_{i}}{C_i} and \eqn{C_{j}}{C_j} is the mean of the distances between the pair of points {x} and {y}, where \eqn{x \in C_{i}, y \in C_{j}}{x in C_i, y in C_j}.
       |                                                                                                                                                                                         ^
checkRd: (-1) NbClust.Rd:75-138: Only 2 columns allowed in this table (row 3 has 1)
checkRd: (-1) NbClust.Rd:75-138: Only 2 columns allowed in this table (row 5 has 1)
checkRd: (-1) NbClust.Rd:75-138: Only 2 columns allowed in this table (row 9 has 1)
checkRd: (-1) NbClust.Rd:75-138: Only 2 columns allowed in this table (row 23 has 1)
checkRd: (-1) NbClust.Rd:75-138: Only 2 columns allowed in this table (row 25 has 1)
checkRd: (-1) NbClust.Rd:75-138: Only 2 columns allowed in this table (row 27 has 1)
checkRd: (-1) NbClust.Rd:75-138: Only 2 columns allowed in this table (row 29 has 1)
checkRd: (-1) NbClust.Rd:75-138: Only 2 columns allowed in this table (row 31 has 1)
checkRd: (-1) NbClust.Rd:75-138: Only 2 columns allowed in this table (row 33 has 1)
checkRd: (-1) NbClust.Rd:75-138: Only 2 columns allowed in this table (row 35 has 1)
checkRd: (-1) NbClust.Rd:75-138: Only 2 columns allowed in this table (row 39 has 1)
checkRd: (-1) NbClust.Rd:75-138: Only 2 columns allowed in this table (row 41 has 1)
checkRd: (-1) NbClust.Rd:75-138: Only 2 columns allowed in this table (row 43 has 1)
checkRd: (-1) NbClust.Rd:75-138: Only 2 columns allowed in this table (row 45 has 1)
checkRd: (-1) NbClust.Rd:75-138: Only 2 columns allowed in this table (row 47 has 1)
checkRd: (-1) NbClust.Rd:75-138: Only 2 columns allowed in this table (row 49 has 1)
checkRd: (-1) NbClust.Rd:75-138: Only 2 columns allowed in this table (row 51 has 1)
checkRd: (-1) NbClust.Rd:75-138: Only 2 columns allowed in this table (row 53 has 1)
checkRd: (-1) NbClust.Rd:75-138: Only 2 columns allowed in this table (row 55 has 1)
checkRd: (-1) NbClust.Rd:75-138: Only 2 columns allowed in this table (row 57 has 1)
checkRd: (-1) NbClust.Rd:75-138: Only 2 columns allowed in this table (row 59 has 1)
checkRd: (-1) NbClust.Rd:75-138: Only 2 columns allowed in this table (row 61 has 1)