Spatial and temporal regularization to estimate COVID-19 reproduction number R(t): Promoting piecewise smoothness via convex optimization
Fig 4
Number of daily new confirmed cases for France, reproduction numbers and local trends, using data from Source2(ECDPC) (left) and Source3(SPF) (right) (reconstructed proxy from hospital counts).
Top: time series. Middle: fast (red) and slowly (blue) evolving estimates of R(t). Bottom: fast (red) and slowly (blue) evolving estimates of local trends β(t). The title of the plots reports the slow and fast estimates of R for the current day.