[英]How to plot % positive cases (y-axis) by collection date (x-axis) and by other factors (R)?
請幫忙! 我有需要盡快准備報告的案例數據,但無法正確顯示圖表。
從以 CollectionDate 作為案例“記錄”的數據集(即具有相同日期的多行意味着當天更多案例),我想顯示當天的陽性病例數/總(陽性 + 陰性)病例數作為百分比y 軸,收集日期沿 x 軸。 然后我想按地區細分。 目標是看起來像這樣,但根據每日陽性/測試次數,而不僅僅是陽性與陰性。 我還想在每個圖表上添加一條 20% 的水平線。
ggplot(df_final, aes(x =CollectionDate, fill = TestResult)) +
geom_bar(aes(y=..prop..)) +
scale_y_continuous(labels=percent_format())
這是,再次,關閉。 但是百分比是錯誤的,因為它們只是將當天的比例與所有天數而不是每天數相比較。
然后我嘗試在以下命令中使用tally()
來嘗試按區域計數並聚合:
df_final %>%
group_by(CollectionDate, Region, as.factor(TestResult)) %>%
filter(TestResult == "Positive") %>%
tally()
我仍然無法正確繪制圖表。 建議?
head(df_final)
我可以讓你走到一半(請參閱代碼中的注釋以進行澄清)。 此代碼用於每個區域每天的計數(為每個區域單獨繪制)。 我認為您也可以進一步調整以計算每個縣每天的計數; 整個 state 應該是小菜一碟。 祝你的報告好運。
rm(list = ls())
library(dplyr)
library(magrittr)
library(ggplot2)
library(scales)
library(tidyr) #Needed for the spread() function
#Dummy data
set.seed(1984)
sdate <- as.Date('2000-03-09')
edate <- as.Date('2000-05-18')
dateslist <- as.Date(sample(as.numeric(sdate): as.numeric(edate), 10000, replace = TRUE), origin = '1970-01-01')
df_final <- data.frame(Region = rep_len(1:9, 10000),
CollectionDate = dateslist,
TestResult = sample(c("Positive", "Negative"), 10000, replace = TRUE))
#First tally the positve and negative cases
#by Region, CollectionDate, TestResult in that order
df_final %<>%
group_by(Region, CollectionDate, TestResult) %>%
tally()
#Then
#First spread the counts (in n)
#That is, create separate columns for Negative and Positive cases
#for each Region-CollectionDate combination
#Then calculate their proportions (as shown)
#Now you have Negative and Positive
#percentages by CollectionDate by Region
df_final %<>%
spread(key = TestResult, value = n) %>%
mutate(Negative = Negative/(Negative + Positive),
Positive = Positive/(Negative + Positive))
#Plotting this now
#Since the percentages are available already
#Use geom_col() instead of geom_bar()
df_final %>% ggplot() +
geom_col(aes(x = CollectionDate, y = Positive, fill = "Positive"),
position = "identity", alpha = 0.4) +
geom_col(aes(x = CollectionDate, y = Negative, fill = "Negative"),
position = "identity", alpha = 0.4) +
facet_wrap(~ Region, nrow = 3, ncol = 3)
好吧,我不得不說我不是 100% 確定我得到了你想要的,但無論如何,這可能會有所幫助。
數據:由於您是新來的,我必須讓您知道,使用您的數據的簡單且可重復的版本將使我們的 rest 更容易回答。 為此,您可以模擬任何其他對象的數據框,或在其上使用 dput function。
library(ggplot2)
library(dplyr)
data <- data.frame(
# date
CollectionDate = sample(
seq(as.Date("2020-01-01"), by = "day", length.out = 15),
size = 120, replace = TRUE),
# result
TestResult = sample(c("Positive", "Negative"), size = 120, replace = TRUE),
# region
Region = sample(c("Region 1", "Region2"), size = 120, replace = TRUE)
)
有了這些數據,你就可以跟着做得到你想要的圖。
# General plot, positive cases proportion
data %>%
count(CollectionDate, TestResult, name = "cases") %>%
group_by(CollectionDate) %>%
summarise(positive_pro = sum(cases[TestResult == "Positive"])/sum(cases)) %>%
ggplot(aes(x = CollectionDate, y = positive_pro)) +
geom_col() +
geom_hline(yintercept = 0.2)
# positive proportion by day within region
data %>%
count(CollectionDate, TestResult, Region, name = "cases") %>%
group_by(CollectionDate, Region) %>%
summarise(
positive_pro = sum(cases[TestResult == "Positive"])/sum(cases)
) %>%
ggplot(aes(x = CollectionDate, y = positive_pro)) +
geom_col() +
# horizontal line at 20%
geom_hline(yintercept = 0.2) +
facet_wrap(~Region)
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