Bill pointed out some errors in your code but you keep making the claim that YYYY-MM-DD is not recognized and I just want to make it completely clear that that is the default format for dates in R as it is an ISO standard. So focus on other issues until you get it working... this format is definitely not your problem.
On December 13, 2020 5:34:45 PM PST, Gregory Coats via R-help <r-help@r-project.org> wrote: >Hi Jim, >Thank you VERY much! >In what I tried, my values for the vertical Y were automatically >understood by R. >But it appears that the string yyyy-mm-dd was NOT recognized by R as a >date for the X axis, and gave a red error message. >My values for Year-Month-Day were NOT understood by R. >Is there a convenient way to tell R to interpret “2020-12-13” as a >date? > >data <- data.frame( >day = as.Date("2020-02-15", "2020-03-10", "2020-05-04", "2020-06-21", >"2020-08-01", "2020-08-27", "2020-09-28", "2020-11-09", "2020-12-11") >value = (15.973, 18.832, 17.392, 14.774, 19.248, 14.913, 15.226, >14.338, 18.777, 19.652)) >p <- ggplot(data, aes(x=day, y=value)) > geom_line() > xlab("X Label") >p >Error: unexpected symbol in: >" day = as.Date("2020-02-15", "2020-03-10", "2020-05-04", >"2020-06-21", "2020-08-01", "2020-08-27", "2020-09-28", "2020-11-09", >"2020-12-11") > value" > >Greg Coats >gregco...@me.com >Reston, Virginia USA > >> On Dec 13, 2020, at 5:42 PM, Jim Lemon <drjimle...@gmail.com> wrote: >> >> Hi Gregory, >> Here's a start: >> >> gcdf<-read.table(text="2020-01-05 15.973 >> 2020-02-15 18.832 >> 2020-03-10 17.392 >> 2020-05-04 14.774 >> 2020-06-21 19.248 >> 2020-08-01 14.913 >> 2020-08-27 15.226 >> 2020-09-28 14.338 >> 2020-11-09 18.777 >> 2020-12-11 19.652", >> header=TRUE,stringsAsFactors=FALSE, >> col.names=c("date","gallons")) >> gcdf$date<-as.Date(gcdf$date,"%Y-%m-%d") >> plot(gcdf$date,gcdf$gallons,main="Gallons by date", >> xlab="Date",ylab="Gallons") >> >> Jim >> >> On Mon, Dec 14, 2020 at 9:33 AM Gregory Coats via R-help >> <r-help@r-project.org> wrote: >>> >>> Starting with year-month-day, for the variable gallons, I can easily >plot the variable gallons, while disregarding the date. >>> gallons <- c (15.973, 18.832, 17.392, 14.774, 19.248, 14.913, >15.226, 14.338, 18.777, 19.652) >>> plot (gallons, type="l", xlab="X label", ylab="Y label", col="blue”) >>> >>> How do I direct R to plot the variable gallons, at the appropriate, >irregularly-spaced places on the X axis, while paying attention to the >year-month-day? >>> >>> format = "%Y-%m-%d” >>> 2020-01-05 15.973 >>> 2020-02-15 18.832 >>> 2020-03-10 17.392 >>> 2020-05-04 14.774 >>> 2020-06-21 19.248 >>> 2020-08-01 14.913 >>> 2020-08-27 15.226 >>> 2020-09-28 14.338 >>> 2020-11-09 18.777 >>> 2020-12-11 19.652 >>> [[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. -- 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.