> On Oct 14, 2016, at 3:51 PM, Rich Shepard <rshep...@appl-ecosys.com> wrote: > > On Fri, 14 Oct 2016, David Winsemius wrote: > >>> rain <- source("~/raindata.dat") >>> str(rain) >> List of 2 >> $ value :'data.frame': 341 obs. of 3 variables: >> ..$ station: Factor w/ 6 levels "0.3E","0.6W",..: 1 1 1 1 1 1 1 1 1 1 ... >> ..$ date : Factor w/ 62 levels "2013-12-01","2013-12-02",..: 32 33 34 35 >> 36 37 38 39 40 41 ... >> ..$ amount : Factor w/ 48 levels "","0.00","0.01",..: 1 1 3 2 2 2 12 18 34 >> 14 ... >> $ visible: logi TRUE > > David, > > I left the station as a factor and changed the date using > as.Date(as.character...) and the amount using as.numeric. > >> When you do that you can see the only the first item in the length2 list >> is likely to be useful: > > I'm not seeing to what the 'List of 2' refers in the data.frame. > > This is the script I sourced: > > rain <- read.csv("daily_records.csv", header=T, sep=",") > require(lattice) > rain$date <- as.Date(as.character(rain$date)) > rain$amount <- as.numeric(rain$amount) > xyplot(rain$amount ~ rain$date | rain$station, main="Weather Stations", > xlab="Date", ylab="Amount (inches)", pch=20, col=132) > > What did I do incorrectly here?
Well, you didn't send a text file with the contents of "daily_records.csv"; rather you sent a text file that was R code that would return a data object. I assigned it to the name `rain` before I realized it was a two item list. I then fixed the problems that assignment and the factor Dates presented so that I could then give a `data=rain` parameter to the xyplot function. > > >> And the date column is a factor. Fortunately the as.Date.factor function >> doesn't need as.chaacter anymore: > > Oh. Thanks. > >> The place on the ?xyplot help page to look is in the section on `scales`. >> There's no difficulty using 'rot' as long as it is in the correct place >> which in this instance is `x` sublist of the `scales` list > >> xyplot(amount ~ date | station, data=rain, main="Weather Stations", >> xlab="Date", ylab="Amount (inches)", pch=16, col=132, >> scales=list(y=list(at=0:4), >> x=list(at=seq(min(rain$date), max(rain$date), by='week'), >> rot=90) ) >> ) Notice that the formula has just the column names rather than using `$`. But need to give `rain$date` to functions in hte scales list. It always seemed to me that the evaluation of names inside the scales list should also be evaluated inside the `data` environment but Deepayan didn't design it that way, so you need to "reach out" to get them pulled back in. > > That's what I missed: where the scales command is placed, and > understanding how to use all the components. > > I need to figure out why I'm no longer seeing the help files. As far as I > know they should be loaded when I invoke R. So typing ?xyplot at the console doesn't bring up a help page? That would imply that you need to reinstall R. > > Thanks very much, > > Rich > > ______________________________________________ > Remail@example.com 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. David Winsemius Alameda, CA, USA ______________________________________________ Rfirstname.lastname@example.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.