С geom_area
Я возвращал ошибку при заполнении графика (суперпозиция), поэтому я использовал geom_bar
.
library(SPEI)
library(tidyverse)
library(zoo)
library(reshape2)
library(scales)
data("balance")
SPEI_12=spei(balance,12)
SpeiData=SPEI_12$fitted
myDate=as.data.frame(seq(as.Date("1901-01-01"), to=as.Date("2008-12-31"),by="months"))
names(myDate)= "Dates"
myDate$year=as.numeric(format(myDate$Dates, "%Y"))
myDate$month=as.numeric(format(myDate$Dates, "%m"))
myDate=myDate[,-1]
newDates = as.character(paste(month.abb[myDate$month], myDate$year, sep = "_" ))
DataWithDate = data.frame(newDates,SpeiData)
df_spei12 = melt(DataWithDate, id.vars = "newDates" )
SPEI12 = df_spei12 %>%
na.omit() %>%
mutate(sign = ifelse(value >= 0, "pos", "neg"))
###
SPEI12_md <- SPEI12 %>%
dplyr::mutate(Date = lubridate::parse_date_time(newDates, "m_y"),
Date = lubridate::ymd(Date),
variable = as.factor(variable))
levels(SPEI12_md$variable) <- c("Indore", "Kimberley", "Albuquerque", "Valencia",
"Viena", " Abashiri", "Tampa", "São Paulo",
"Lahore", "Punta Arenas", "Helsinki")
v <- 0.1 # 0.1 it is a gap
v1 <- min(SPEI12_md$value) - v
v2 <- max(SPEI12_md$value) + v
vv <- signif(max(abs(v1), abs(v2)), 2)
ggplot2::ggplot(SPEI12_md) +
geom_bar(aes(x = Date, y = value, col = sign, fill = sign),
show.legend = F, stat = "identity") +
scale_color_manual(values = c("pos" = "darkblue", "neg" = "red")) +
scale_fill_manual(values = c("pos" = "darkblue", "neg" = "red")) +
facet_wrap(~variable) +
scale_x_date(date_breaks = "10 years",
labels = scales::date_format("%Y-%m")) + #
scale_y_continuous(limits = c(-vv, vv), breaks = c(seq(-vv-v, 0, length.out = 3),
seq(0, vv+v, length.out = 3))) +
ylab("SPEI") + ggtitle("12-Month SPEI") +
theme_bw() + theme(plot.title = element_text(hjust = 0.5, size = 16, face = "bold"),
axis.text = element_text(size=12, colour = "black"),
axis.title = element_text(size = 12,face = "bold"),
axis.text.x = element_text(angle = 90, size = 10))