I am pretty new to R and I am trying to copy a calculation done in Excel to R.
I have a data frame like this:
Component <- c("A", "B", "C")
Report_Time <- c(5781, 5781, 5781)
Interval <- c(700, 600, 800)
End_Time <- c(8281, 8281, 8281)
Start_Time <- c(800, 298, 780)
df <- data.frame(Component, Report_Time, Interval, End_Time, Start_Time)
When Printed it looks like this:
# Component Report_Time Interval End_Time Start_Time
#1 A 5781 700 8281 800
#2 B 5781 600 8281 298
#3 C 5781 800 8281 780
For each component, I want to populate a calculated column "Interval_Time", which is the sum of Start Time + Report_Time for First, then if it is less than End_Time the insert a row with the sum of Interval_Time (Last sum) + Interval. Repeat inserting till the sum in Interval time is less than End_Time.
# Component Report_Time Interval End_Time Start_Time Interval_Time
#1 A 5781 700 8281 800 6581
#2 A 5781 700 8281 800 7281
#3 A 5781 700 8281 800 7981
#4 B 5781 1000 8281 298 6079
#5 B 5781 1000 8281 298 7079
#6 B 5781 1000 8281 298 8079
#7 C 5781 1200 8281 780 6561
#8 C 5781 1200 8281 780 7761
I have been trying to achive this with if inside a for loop.. but haven't been succesfull.
With data.table:
Component <- c("A", "B", "C")
Report_Time <- c(5781, 5781, 5781)
Interval <- c(700, 1000, 1200)
End_Time <- c(8281, 8281, 8281)
Start_Time <- c(800, 298, 780)
df <- data.frame(Component, Report_Time, Interval, End_Time, Start_Time)
library(data.table)
setDT(df)
df<-df[rep(1:.N,ceiling((End_Time-Start_Time-Report_Time)/Interval))]
df[,Interval_Time:=ifelse(.I==1,Start_Time+Report_Time,Start_Time+cumsum(Interval)+Report_Time-Interval),by=.(Component)]
df
Component Report_Time Interval End_Time Start_Time Interval_Time
1: A 5781 700 8281 800 6581
2: A 5781 700 8281 800 7281
3: A 5781 700 8281 800 7981
4: B 5781 1000 8281 298 6079
5: B 5781 1000 8281 298 7079
6: B 5781 1000 8281 298 8079
7: C 5781 1200 8281 780 6561
8: C 5781 1200 8281 780 7761