Convert 12hour time to 24Hour time
- by RwardBound
I have hourly weather data. I've seen the function examples from here: http://casoilresource.lawr.ucdavis.edu/drupal/node/991
I'm altering the code to account for airport data, which has a different URL type. Another issue with the airport weather data is that the time data is saved in 12 hour format. Here is a sample of the data:
14 10:43 AM
15 10:54 AM
16 11:54 AM
17 12:07 PM
18 12:15 PM
19 12:54 PM
20 1:54 PM
21 2:54 PM
Here's what I attempted: (I see that using just 'PM' isn't careful enough because any times between 12 and 1 pm will be off if they go through this alg)
date<-Sys.Date()
data$TimeEST<-strsplit(data$TimeEST, ' ')
for (x in 1:35){
if('AM' %in% data$TimeEST[[x]]){
gsub('AM','',data$TimeEST[[x]])
data$TimeEST[[x]]<-str_trim(data$TimeEST[[x]])
data$TimeEST[[x]]<-str_c(date,' ',data$TimeEST[x],':',data$TimeEST[2])
}
else if('PM' %in% data$TimeEST[[x]]){
data$TimeEST[[x]]<-gsub('PM', '',data$TimeEST[[x]])
data$TimeEST[[x]]<-strsplit(data$TimeEST[[x]], ':')
data$TimeEST[[x]][[1]][1]<-as.integer(data$TimeEST[[x]][[1]][1])+12
data$TimeEST[[x]]<-str_trim(data$TimeEST[[x]][[1]])
data$TimeEST[[x]]<-str_c(date, " ", data$TimeEST[[x]][1],':',data$TimeEST[[x]][2])
}
}
Any help?
