Please run your sequence of R statements one at a time so you can tell where the problem is. Only "run a script" after the code works one line at a time. There are too many places where things can go wrong otherwise.
Is your file being read in properly? Is the filename correct? was the header properly recognized? I see something odd about the input you are providing to the "origin" argument to the as.Date function. On June 15, 2024 1:42:45 PM PDT, Jibrin Alhassan <jibrin.alhas...@unn.edu.ng> wrote: >Thank you Rui. I ran the following script >df1 <- read.table("solar_hour", header = TRUE) >df1$date <- as.Date(paste(df1$year, df1$hour), > format = "%Y %j", >origin = "2012-08-01-0") >df2 <- df1[c("date", "IMF", "SWS", "SSN", "Dst", "f10")] >head(df1) >#To display all the rows > print(df2). >It gave me this error message >> source ("script.R") >Error in `$<-.data.frame`(`*tmp*`, date, value = numeric(0)) : > replacement has 0 rows, data has 38735 >> print(df2) >Error: object 'df2' not found >> My data is an hourly data but desire to have the date as >year month day hour >2012 08 01 01 >2012 08 01 02 >2012 08 01 03 etc >Thanks. > >*Jibrin Adejoh Alhassan (Ph.D)* >Department of Physics and Astronomy, >University of Nigeria, Nsukka > > >On Sat, Jun 15, 2024 at 8:34 PM Rui Barradas <ruipbarra...@sapo.pt> wrote: > >> Às 20:00 de 15/06/2024, Jibrin Alhassan escreveu: >> > I have solar-geophysical data e.g as blow: >> > YEAR DOY HR IMF SW SSN Dst f10.7 >> > 2012 214 0 3.4 403. 132 -9 154.6 >> > 2012 214 1 3.7 388. 132 -10 154.6 >> > 2012 214 2 3.7 383. 132 -10 154.6 >> > 2012 214 3 3.7 391. 132 -9 154.6 >> > 2012 214 4 4.2 399. 132 -7 154.6 >> > 2012 214 5 4.1 411. 132 -6 154.6 >> > 2012 214 6 4.0 407. 132 -6 154.6 >> > 2012 214 7 4.2 404. 132 -4 154.6 >> > 2012 214 8 4.3 405. 132 -6 154.6 >> > 2012 214 9 4.4 409. 132 -6 154.6 >> > 2012 214 10 4.4 401. 132 -6 154.6 >> > 2012 214 11 4.5 385. 132 -7 154.6 >> > 2012 214 12 4.7 377. 132 -8 154.6 >> > 2012 214 13 4.7 382. 132 -6 154.6 >> > 2012 214 14 4.3 396. 132 -4 154.6 >> > 2012 214 15 4.1 384. 132 -2 154.6 >> > 2012 214 16 4.0 382. 132 -1 154.6 >> > 2012 214 17 3.9 397. 132 0 154.6 >> > 2012 214 18 3.8 390. 132 1 154.6 >> > 2012 214 19 4.2 400. 132 2 154.6 >> > 2012 214 20 4.6 408. 132 1 154.6 >> > 2012 214 21 4.8 401. 132 -3 154.6 >> > 2012 214 22 4.9 395. 132 -5 154.6 >> > 2012 214 23 5.0 386. 132 -1 154.6 >> > 2012 215 0 5.0 377. 143 -1 138.6 >> > 2012 215 1 4.9 384. 143 -2 138.6 >> > 2012 215 2 4.9 390. 143 -4 138.6 >> > 2012 215 3 4.9 372. 143 -6 138.6 >> > 2012 215 4 5.1 371. 143 -4 138.6 >> > I want to process it to be of the format as shown below >> > y m d hr imf sws ssn Dst f10.7 >> > 2012-08-01 10 3.4 403. 132 -9 154.6 >> > 2012-08-01 12 3.7 388. 132 -10 154.6 >> > 2012-08-01 15 3.7 383. 132 -10 154.6 >> > 2012-08-01 17 3.7 391. 132 -9 154.6 >> > I want to request an R code to accomplish this task. Thanks for your >> time. >> > *Jibrin Adejoh Alhassan (Ph.D)* >> > Department of Physics and Astronomy, >> > University of Nigeria, Nsukka >> > >> > [[alternative HTML version deleted]] >> > >> > ______________________________________________ >> > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >> > https://stat.ethz.ch/mailman/listinfo/r-help >> > PLEASE do read the posting guide >> http://www.R-project.org/posting-guide.html >> > and provide commented, minimal, self-contained, reproducible code. >> Hello, >> >> To create a date column, paste the first two columns and coerce to class >> "Date" with conversion specifications %Y for the 4 digit year and %j for >> the day of year. See >> >> help("strptime") >> >> >> >> df1 <- read.table(text = "YEAR DOY HR IMF SW SSN Dst f10.7 >> 2012 214 0 3.4 403. 132 -9 154.6 >> 2012 214 1 3.7 388. 132 -10 154.6 >> 2012 214 2 3.7 383. 132 -10 154.6 >> 2012 214 3 3.7 391. 132 -9 154.6 >> 2012 214 4 4.2 399. 132 -7 154.6 >> 2012 214 5 4.1 411. 132 -6 154.6 >> 2012 214 6 4.0 407. 132 -6 154.6 >> 2012 214 7 4.2 404. 132 -4 154.6 >> 2012 214 8 4.3 405. 132 -6 154.6 >> 2012 214 9 4.4 409. 132 -6 154.6 >> 2012 214 10 4.4 401. 132 -6 154.6 >> 2012 214 11 4.5 385. 132 -7 154.6 >> 2012 214 12 4.7 377. 132 -8 154.6 >> 2012 214 13 4.7 382. 132 -6 154.6 >> 2012 214 14 4.3 396. 132 -4 154.6 >> 2012 214 15 4.1 384. 132 -2 154.6 >> 2012 214 16 4.0 382. 132 -1 154.6 >> 2012 214 17 3.9 397. 132 0 154.6 >> 2012 214 18 3.8 390. 132 1 154.6 >> 2012 214 19 4.2 400. 132 2 154.6 >> 2012 214 20 4.6 408. 132 1 154.6 >> 2012 214 21 4.8 401. 132 -3 154.6 >> 2012 214 22 4.9 395. 132 -5 154.6 >> 2012 214 23 5.0 386. 132 -1 154.6 >> 2012 215 0 5.0 377. 143 -1 138.6 >> 2012 215 1 4.9 384. 143 -2 138.6 >> 2012 215 2 4.9 390. 143 -4 138.6 >> 2012 215 3 4.9 372. 143 -6 138.6 >> 2012 215 4 5.1 371. 143 -4 138.6", header = TRUE) >> >> >> with(df1, paste(YEAR, DOY)) |> as.Date(format = "%Y %j") >> #> [1] "2012-08-01" "2012-08-01" "2012-08-01" "2012-08-01" "2012-08-01" >> #> [6] "2012-08-01" "2012-08-01" "2012-08-01" "2012-08-01" "2012-08-01" >> #> [11] "2012-08-01" "2012-08-01" "2012-08-01" "2012-08-01" "2012-08-01" >> #> [16] "2012-08-01" "2012-08-01" "2012-08-01" "2012-08-01" "2012-08-01" >> #> [21] "2012-08-01" "2012-08-01" "2012-08-01" "2012-08-01" "2012-08-02" >> #> [26] "2012-08-02" "2012-08-02" "2012-08-02" "2012-08-02" >> >> # now create the column >> df1$Date <- with(df1, paste(YEAR, DOY)) |> as.Date(format = "%Y %j") >> # remove the columns no longer needed >> df1 <- df1[-(1:2)] >> # relocate the new date column >> df1 <- df1[c(ncol(df1), 1:(ncol(df1) - 1L))] >> head(df1) >> #> Date HR IMF SW SSN Dst f10.7 >> #> 1 2012-08-01 0 3.4 403 132 -9 154.6 >> #> 2 2012-08-01 1 3.7 388 132 -10 154.6 >> #> 3 2012-08-01 2 3.7 383 132 -10 154.6 >> #> 4 2012-08-01 3 3.7 391 132 -9 154.6 >> #> 5 2012-08-01 4 4.2 399 132 -7 154.6 >> #> 6 2012-08-01 5 4.1 411 132 -6 154.6 >> >> >> Hope this helps, >> >> Rui Barradas >> >> >> -- >> Este e-mail foi analisado pelo software antivírus AVG para verificar a >> presença de vírus. >> www.avg.com >> > > [[alternative HTML version deleted]] > >______________________________________________ >R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >https://stat.ethz.ch/mailman/listinfo/r-help >PLEASE do read the posting guide http://www.R-project.org/posting-guide.html >and provide commented, minimal, self-contained, reproducible code. -- Sent from my phone. Please excuse my brevity. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.