Incidence can now handle standardised weeks starting on any day thanks to the aweek package :tada:

library(incidence)
library(ggplot2)
library(cowplot)
d <- as.Date("2019-03-11") + -7:6
setNames(d, weekdays(d))
#> Monday Tuesday Wednesday Thursday Friday
#> "2019-03-04" "2019-03-05" "2019-03-06" "2019-03-07" "2019-03-08"
#> Saturday Sunday Monday Tuesday Wednesday
#> "2019-03-09" "2019-03-10" "2019-03-11" "2019-03-12" "2019-03-13"
#> Thursday Friday Saturday Sunday
#> "2019-03-14" "2019-03-15" "2019-03-16" "2019-03-17"
imon <- incidence(d, "mon week") # also ISO week
itue <- incidence(d, "tue week")
iwed <- incidence(d, "wed week")
ithu <- incidence(d, "thu week")
ifri <- incidence(d, "fri week")
isat <- incidence(d, "sat week")
isun <- incidence(d, "sun week") # also MMWR week and EPI week

pmon <- plot(imon, show_cases = TRUE, labels_week = FALSE)
ptue <- plot(itue, show_cases = TRUE, labels_week = FALSE)
pwed <- plot(iwed, show_cases = TRUE, labels_week = FALSE)
pthu <- plot(ithu, show_cases = TRUE, labels_week = FALSE)
pfri <- plot(ifri, show_cases = TRUE, labels_week = FALSE)
psat <- plot(isat, show_cases = TRUE, labels_week = FALSE)
psun <- plot(isun, show_cases = TRUE, labels_week = FALSE)
s <- scale_x_date(limits = c(as.Date("2019-02-26"), max(d) + 7L))
plot_grid(
pmon + s,
ptue + s,
pwed + s,
pthu + s,
pfri + s,
psat + s,
psun + s)
multi-weeks/months/years can now be handled
library(incidence)
library(outbreaks)
d <- ebola_sim_clean$linelist$date_of_onset
h <- ebola_sim_clean$linelist$hospital
plot(incidence(d, interval = "1 epiweek", group = h))
plot(incidence(d, interval = "2 epiweeks", group = h))
plot(incidence(d, interval = "3 epiweeks", group = h))
plot(incidence(d, interval = "2 months", group = h))
^{Created on 2019-03-14 by the [reprex package](https://reprex.tidyverse.org) (v0.2.1)}

Full set of changes NEW FEATURES
Any interval seq.Date() can handle (e.g. "5 weeks") can be handled by incidence() (see https://github.com/reconhub/incidence/issues/67)
Weekly intervals can start on any day of the week by allowing things like "epiweek", "isoweek", "wednesday week", "2 Saturday weeks", etc. (see https://github.com/reconhub/incidence/issues/55#issuecomment-405297526)
the item $weeks is now added to the incidence object, which contains an "aweek" class
plotting will now force the first tick to be the starting point of the incidence curve
NEW FUNCTIONS
make_breaks() will automatically calculate breaks from an incidence object for plotting.
scale_x_incidence() will produce a ggplot2 "ScaleContinuous" object to add to a ggplot.
DEPRECATED
plot.incidence() argument labels_iso is deprecated in favor of labels_week
Incidence objects will still have $isoweeks if the weeks are ISO 8601 standard, but users should rely intead on $weeks instead. The $isoweeks element will be removed in a future version of incidence.
as.incidence() argument isoweeks has been deprecated in favour of standard
DEPENDENCIES
ISOweek import changed to aweek
Documentation
Vignettes have been updated with examples.