fid {glmnet} | R Documentation |
Helps to find ties in death times of data.
fid(x, index)
x |
Sorted vector of death times. |
index |
Vector of indices for the death times. |
A list with two arguments.
index_first |
A vector of indices for the first observation at each death time as they appear in the sorted list. |
index_ties |
If there are no ties at all, this is NULL. If not, this is a list with length equal to the number of unique times with ties. For each time with ties, index_ties gives the indices of the observations with a death at that time. |
# Example with no ties
glmnet:::fid(c(1, 4, 5, 6), 1:5)
# Example with ties
glmnet:::fid(c(1, 1, 1, 2, 3, 3, 4, 4, 4), 1:9)