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Check for any TRUE values in a prior window

Source: R/any_events_prior_to.R
any_events_prior_to.Rd

Checks if any TRUE values exist in the preceding window, excluding the current row. Useful for determining if an event occurred in a prior time period.

Usage

any_events_prior_to(x, window_excluding_wk0 = 104L)

Arguments

x

Logical vector

window_excluding_wk0

Number of prior weeks to check, excluding current week (default 104, ~2 years). Use a large number (e.g., 99999) for lifetime history.

Value

Logical vector indicating if any TRUE in prior window

Details

For infinite/large windows (>= 99999), uses O(n) cumsum approach. For finite windows, uses O(n) data.table::frollsum. Both exclude the current row (week 0).

See also

[steps_to_first()] for counting steps until first event

Other survival_analysis: steps_to_first()