Convert 12hour time to 24Hour time

Question

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

Answer 1

take a look at ?strptime.

as.POSIXct(data$TimeEST, format='%I:%M %p')