r - 检测范围内的双日期并调整日期

Question

我有以下数据框：

library(hydroGOF)
library(ModelMetrics)
library(dplyr)
Date_from <- c("2013-01-01","2013-01-04","2013-01-06","2013-01-11")
Date_to <- c("2013-01-03","2013-01-06","2013-01-10","2013-01-14")
Parameter <- c("Par1","Par1","Par1","Par1")
conc<-c("1.5","2.5","1.5","1.8")
metals<-data.frame(Date_from,Date_to,Parameter,conc)
metals$Date_from<-as.Date(metals$Date_from)
metals$Date_to<-as.Date(metals$Date_to)
metals$conc<-as.numeric(as.character(metals$conc))

我需要在日期范围内检测错误的开始日期。在此示例中，它将是从 2013-01-06 开始的第三个范围，这是第二个日期范围的结束日期。我需要代码来检测这一点并在前一个日期范围结束后一天调整开始日期。结果应如下所示：

Date_from    Date_to Parameter conc
2013-01-01 2013-01-03      Par1  1.5
2013-01-04 2013-01-06      Par1  2.5
2013-01-07 2013-01-10      Par1  1.5
2013-01-11 2013-01-14      Par1  1.8

标签： rdatedplyr

Answer 1

你可以试试：

ind = which(difftime(metals$Date_to,lead(metals$Date_from))==0)+1 #search for time difference == 0, save the index

metals[ind,"Date_from"] = metals[ind,"Date_from"] + 1 # add a day to the start date