Hi Stefano, you try to facet on 'variable' and 'scales' which aren't part of your data.frame as far as I can see. The error 'At least one layer must contain all variables used for facetting' also tells you this - that at least one of the variables you use for facetting are missing.
Hope this helps, Ulrik On Sun, 7 Feb 2016 at 19:28 Stefano Sofia <stefano.so...@regione.marche.it> wrote: > Dear list users, > I would like to have multiple plots in one page with ggplot, in particular > five graphs: > in the central plot the snow cover (hs) of two meteorological stations; > above wind direction and temperature of one of the two stations and below > wind direction and temperature of the other station. > > My data frame (df) is like > > date hs1 temp1 wind1 wind_dir1 pch_wind_dir1 color_wind_dir1 hs2 temp2 > wind2 wind_dir2 pch_wind_dir2 color_wind_dir2 > 2014-12-27 00:00:00 20 -4.2 6.8 NW 5 "blue" 40 -4.2 6.8 NW 5 "blue" > 2014-12-27 00:30:00 22 -4.3 4.3 NNE 5 "cyan" 42 -4.3 4.3 NNE 5 "cyan" > 2014-12-27 01:00:00 24 -4.1 5.7 NNW 10 "cyan" 44 -4.1 5.7 NNW 10 "cyan" > 2014-12-27 10:00:00 30 -2.6 7.2 NNW 10 "cyan" 44 -3.1 5.7 NNW 10 "cyan" > ... > > with 48 rows. > > The ylim of hs1 and hs2 should be fixed between 0 and 200cm, hs1 colored > with blue and the other with red; > wind1 and wind2 should take the pch and color described in each row. > > lapply(df, class) gives > > $date > [1] "POSIXct" "POSIXt" > > $hs1 > [1] "numeric" > > $temp1 > [1] "numeric" > > $wind1 > [1] "numeric" > > and so on. > > I have been trying for a long time to do that starting from some examples > found in the web, with no success. The example code I started with is > > > ggplot(df, aes(date, hs1, ymin=0, ymax=200, colour = "blue")) + > scale_colour_identity() + xlim(trunc(df$date[1], "days"), > trunc(df$date[48], "days")) + facet_grid(variable ~ ., scales = "free", > as.table = FALSE) + theme_bw() > > f1 <- f + geom_step(subset = .(variable =="HS")) > > but I always get the following error: > Error in layout_base(data, rows, drop = drop) : > At least one layer must contain all variables used for facetting. > > Is the problem due to how date has been specified? I tried both with > > df$date <- strptime(df$olddata, format = "%Y-%m-%d-%H-%M") > and > > df$date <- as.POSIXct(df$olddata, format = "%Y-%m-%d-%H-%M", tz = "") > but the result is the same. > > Could somebody help me in that? > > Thank you for your attention and your help > Stefano > > > ________________________________ > > AVVISO IMPORTANTE: Questo messaggio di posta elettronica può contenere > informazioni confidenziali, pertanto è destinato solo a persone autorizzate > alla ricezione. I messaggi di posta elettronica per i client di Regione > Marche possono contenere informazioni confidenziali e con privilegi legali. > Se non si è il destinatario specificato, non leggere, copiare, inoltrare o > archiviare questo messaggio. Se si è ricevuto questo messaggio per errore, > inoltrarlo al mittente ed eliminarlo completamente dal sistema del proprio > computer. Ai sensi dell’art. 6 della DGR n. 1394/2008 si segnala che, in > caso di necessità ed urgenza, la risposta al presente messaggio di posta > elettronica può essere visionata da persone estranee al destinatario. > IMPORTANT NOTICE: This e-mail message is intended to be received only by > persons entitled to receive the confidential information it may contain. > E-mail messages to clients of Regione Marche may contain information that > is confidential and legally privileged. Please do not read, copy, forward, > or store this message unless you are an intended recipient of it. If you > have received this message in error, please forward it to the sender and > delete it completely from your computer system. > > [[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. [[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.