#' @title Growth rate of positive cases of COVID19
#' @aliases g_growth_cases
#' @description This function graphs the growth rate of positive cases of COVID19 in DR.
#' @usage g_growth_cases(saveplot = FALSE, savepng = FALSE)
#' @param saveplot Logical. Should save the ggplot objet to the \code{.GlobalEnv}? Default \code{FALSE}.
#' @param savepng Logical. Should save a png version of the plot? Default \code{FALSE}.
#' @return Graph of the growth rate of positive cases and save a
#' copy in png format to the computer at the address defined in \code{setwd()}.
#' @export
#' @examples
#' g_growth_cases(saveplot = TRUE, savepng = FALSE)
#' @name g_growth_cases
g_growth_cases <- function(saveplot = FALSE,
savepng = FALSE){
if (exists('data_province') == FALSE) {
stop("data objects are missing, run load_data_covid_dr()")
}
df_crec_pos <-
data_cum %>%
mutate(CP = round(100 * (Positive / lag(Positive) - 1),2) ) %>%
select(date, CP) %>%
drop_na()
lab_crec_pos <-
labs(title = "DR: Daily growth of COVID-19 positive cases",
subtitle = "%",
caption = "Source: @fidelmorla with the special bulletins of @SaludPublicaRD",
x = "",
y = ""
)
max_cp <-
df_crec_pos %>%
filter(date > max(date) - 12) %>%
summarise(max_cp = max(CP, na.rm = TRUE)) %>%
as.integer() %>%
round(digits = -2) %>%
sum(5)
g_dailygrowth <-
df_crec_pos %>%
filter(date > max(date) - 12) %>%
ggplot(aes(x = date, y = CP)) +
stat_smooth(method = "lm",
formula= y ~ poly(x, 3),
span = 0.8,
level = 0.99,
se = FALSE,
linetype = 3,
color = "red",
size = 0.5,
fill = "pink",
fullrange = TRUE) +
geom_text(show.legend = FALSE, aes(col = "blue",
size = 24,
label = sprintf("%.1f",round(CP,2))),
vjust = -0.5) +
geom_line(aes(col = "blue")) +
geom_point(aes(fill = "blue"), size = 2) +
scale_color_manual(values = "royalblue") +
scale_fill_manual(values = "#0a448f") +
scale_y_continuous(breaks = c(seq(0, max_cp, 2)),
limits = c(0,max_cp)) +
lab_crec_pos +
scale_x_date(date_labels = "%d %b",
date_breaks = "3 days") +
drcovidplots::list_themes['t6']
print(g_dailygrowth) %>% suppressWarnings()
if (saveplot == TRUE){
assign('g_dailygrowth', g_dailygrowth, envir = .GlobalEnv)
}
if (savepng == TRUE) {
ggsave(filename = "dailygrowth.png",
plot = g_dailygrowth,
device = "png",
width = 18.333333333333332 / 1.5,
height = 10.466666666666667 / 1.5,
units = "in")
}
}
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