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Fix initial growth #853

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merged 3 commits into from
Nov 12, 2024
Merged

Fix initial growth #853

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9f5bef8
fix bug in estimating initial growth
sbfnk Nov 12, 2024
fad4602
add news item
sbfnk Nov 12, 2024
484a9fd
Update NEWS.md
sbfnk Nov 12, 2024
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4 changes: 4 additions & 0 deletions NEWS.md
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Original file line number Diff line number Diff line change
@@ -1,5 +1,9 @@
# EpiNow2 (development version)

## Model changes

- A bug was fixed where the initial growth was never estimated (i.e. the prior mean was always zero). By @sbfnk in #853 and reviewed by @seabbs.

# EpiNow2 1.6.1

## Model changes
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2 changes: 1 addition & 1 deletion R/create.R
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Expand Up @@ -561,7 +561,7 @@ create_stan_data <- function(data, seeding_time,
if (stan_data$seeding_time > 1 && nrow(first_week) > 1) {
safe_lm <- purrr::safely(stats::lm)
stan_data$prior_growth <- safe_lm(log(confirm) ~ t,
stan_data = first_week
data = first_week
)[[1]]
stan_data$prior_growth <- ifelse(is.null(stan_data$prior_growth), 0,
stan_data$prior_growth$coefficients[2]
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