sequence_stats: Compute sequence statistics

In MSCA: Unsupervised Clustering of Multiple Censored Time-to-Event Endpoints

Compute sequence statistics

Description

Computes descriptive statistics for sequences, including sequence frequency for any sequence length, and conditional probability and relative risk for sequences of length 2 (pairwise transitions).

Usage

sequence_stats(
  seq_list,
  min_seq_freq = 0.01,
  min_conditional_prob = 0,
  min_relative_risk = 0
)

Arguments

seq_list	A list of data frames containing sequences, typically the output of get_cluster_sequences.
min_seq_freq	Numeric threshold (default = 0.01). Filters out sequences with relative frequency below this value.
min_conditional_prob	Numeric threshold (default = 0). Applies only for pairwise sequences (k = 2).
min_relative_risk	Numeric threshold (default = 0). Applies only for pairwise sequences (k = 2).

Details

For k = 2, the function computes:

• seq_freq: Proportion of all sequences that match the pair

• conditional_prob: P(to | from)

• relative_risk: conditional probability divided by the marginal probability of to

For k > 2, only seq_freq is computed.

Value

A list of data frames, each containing the sequence statistics for one cluster.

See Also

get_cluster_sequences

MSCA documentation built on June 8, 2025, 10:52 a.m.