使用在克隆氏病包中的類"times"
:
library(chron)
Enter <- c("09:12", "17:01")
Enter <- times(paste0(Enter, ":00"))
Exit <- c("10:15", "18:11")
Exit <- times(paste0(Exit, ":00"))
Exit - Enter # durations
sum(Enter < "10:00:00") # no entering before 10am
mean(Enter < "10:00:00") # fraction entering before 10am
sum(Exit > "17:00:00") # no exiting after 5pm
mean(Exit > "17:00:00") # fraction exiting after 5pm
table(cut(hours(Enter), breaks = c(0, 10, 17, 24))) # Counts for indicated hours
## (0,10] (10,17] (17,24]
## 1 1 0
table(hours(Enter)) # Counts of entries each hour
## 9 17
## 1 1
stem(hours(Enter), scale = 2)
## The decimal point is at the |
## 9 | 0
## 10 |
## 11 |
## 12 |
## 13 |
## 14 |
## 15 |
## 16 |
## 17 | 0
顯卡:
tab <- c(table(Enter), -table(Exit)) # Freq at each time. Enter is pos; Exit is neg.
plot(times(names(tab)), tab, type = "h", xlab = "Time", ylab = "Freq")
abline(v = c(10, 17)/24, col = "red", lty = 2) # vertical red lines
abline(h = 0) # X axis
這適用於加/減,並返回小數小時(即3.5而不是3:30)。對於策劃,或許我可以手動爲了暗算時間輸入的頻率值分配給塊。 – gisol
也許提供一些示例數據集並準確解釋您想要繪製的內容以及預期結果 –