# This imports your data into a variable named "weather"
weather <- read.table(text = "Year Julian_day Hour Minute Air_temp Water_temp Rel_hum Wind_int Wind_dir
2012 1 0 0 11.82 4.73 87.2 5.1 310
2012 1 0 1 11.92 4.743 87.2 5 310
2012 1 0 2 11.86 4.748 86.9 4.7 310", header = TRUE)
# Combine the first four columns into a character vector
date_info <- with(weather, paste(Year, Julian_day, Hour, Minute))
# Parse that character vector
strptime(date_info, "%Y %j %H %M")
Convert julian day to day/month/year
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04-06-2022 - |
Question
My post was apparently unclear, so I'm trying to fix it, don't hesitate to tell me if I'm still unclear!
I got a dataframe of physical variables, with a data every minute. I'd like to convert the 4 first columns into a single one: "%d/%m/%Y %H:%M" (GMT) in R.
Year Julian_day Hour Minute Air_temp Water_temp Rel_hum Wind_int Wind_dir
2012 1 0 0 11.82 4.73 87.2 5.1 310
2012 1 0 1 11.92 4.743 87.2 5 310
2012 1 0 2 11.86 4.748 86.9 4.7 310
Solution
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