Centered moving-average smoother

A simple centered rolling mean, used to attenuate day-of-week reporting artefacts (lower weekend counts, Monday catch-up spikes) in daily COVID-19 surveillance series before SIRD-GA estimation. Edge windows are truncated (not padded), so the smoothed series has the same length as the input.

Usage

smooth_series(x, window = 7L)

Arguments

x

Numeric vector.

window

Window width in days (default 7). Must be odd for a symmetric window; even values are incremented by 1 with a warning.

Value

A numeric vector of the same length as x.