Calculate the cosine distance between rows of a matrix or matrices.
cosine_distance_matrix(x, y = NULL)
| x, y | Numeric matrices. The distance between rows of x is calculated if y = NULL. |
|---|
Numeric matrix of the cosine distance between the rows of x and y.
Floating point imprecision in the implementation of tcrossprod leads to values slightly outside
the domain of acos, so cosine similarities are rounded to 8 digits before being converted to distances. This is well
beyond the precision required for most applications and does not pose a problem, especially here where the
experimental uncertainty of ER scores are greater than this.