Thanks Jim. I am trying to apply this to my version with plot_ly, and couldn't make it to work. The sydf$year1 field is numeric, so the min() and max() works, but when I tried to use your formula for the sydf$monthday field I get an error: yrticks <- as.Date(as.character(seq(min(sydf$monthday),max(sydf$monthday),by=2)), "%Y")
Error in seq.default(min(sydf$monthday), max(sydf$monthday), by = 2) : 'from' must be a finite number In addition: Warning message: In seq.default(min(sydf$monthday), max(sydf$monthday), by = 2) : NAs introduced by coercion So I thought maybe you need to sample the tickvals not the ticktext and it would show the corresponding tick labels in the right palaces. Then I tried the way you had like this: sydf<-read.table(text="year1 monthday rate 1993 05-01 0.608 1994 06-01 0.622 1996 07-01 0.623 1998 08-01 0.647 2000 09-01 0.646 2002 10-01 0.625 2004 11-01 0.628 2006 12-01 0.685 2008 01-01 0.679 2010 02-01 0.595 2012 03-01 0.567 2014 04-01 0.599 2016 05-01 0.642 2018 06-01 0.685", header=TRUE, stringsAsFactors=FALSE) yrticks <- as.Date(as.character(seq(min(sydf$year1),max(sydf$year1),by=2)), "%Y") library(plotly) plot_ly(sydf, x = ~year1, y = ~rate, type = 'scatter', mode = 'lines') %>% layout( xaxis = list( ticktext = sydf$monthday, tickvals = sydf$yrticks, tickmode = "array", tickangle = 270 )) But the chart didn't show any tick labels. I guess I need to sample sydf$monthday, right? Because that's what I want to show as tick labels. But the problem is that monthday is string, and can't use a value for "by=", maybe I need to sample somehow by the index position. Thanks, Steven -----Original Message----- From: Jim Lemon <drjimle...@gmail.com> Sent: Thursday, July 11, 2019 10:41 PM To: nst...@gmail.com Cc: r-help mailing list <r-help@r-project.org> Subject: Re: [R] Plotting in R Hi Steven, Neat solution. With a lot more values on the time axis, you will be better off with something like: yrticks<-as.Date(as.character(seq(min(sydf$year1),max(sydf$year1),by=2)), "%Y") axis(1,at=yrticks,labels=format(yrticks,"%Y")) You probably won't need staxlab for that. Jim On Fri, Jul 12, 2019 at 11:55 AM <nst...@gmail.com> wrote: > > Thanks Jim, that worked. > > > I expected that the axis labels would be crowded so I used the plotrix > > library to stagger the x-axis labels. Hope this solves your problem. > I liked how that showed, not overlapping on each other. I wasn't aware of the > plotrix library. > > In my code I was using plot_ly for visualization, because it looked nicer > compared to the simple plot() function, and I have the chart in a Shiny > dashboard (RMD file). > I found in the meantime today some code example for plot_ly and using the > same data it looks like this: > sydf<-read.table(text="year1 monthday rate > 1993 05-01 0.608 > 1994 06-01 0.622 > 1996 07-01 0.623 > 1998 08-01 0.647 > 2000 09-01 0.646 > 2002 10-01 0.625 > 2004 11-01 0.628 > 2006 12-01 0.685 > 2008 01-01 0.679 > 2010 02-01 0.595 > 2012 03-01 0.567 > 2014 04-01 0.599 > 2016 05-01 0.642 > 2018 06-01 0.685", > header=TRUE, > stringsAsFactors=FALSE) > > library(plotly) > plot_ly(sydf, > x = ~year1, > y = ~rate, > type = 'scatter', mode = 'lines') %>% > layout( > xaxis = list( > ticktext = sydf$monthday, > tickvals = sydf$year1, > tickmode = "array", > tickangle = 270 > )) > > This is where I found about the parameters: > https://plot.ly/r/tick-formatting/ > > Now my other challenge is that with my data I have a lot more values on the x > axis, and they overlap even when turned vertically. I guess there must be a > way of taking a number of values evenly from the list of x axis lables, and > use that for the "ticktext" parameter. > I thought it must be some variation of the seq(from, to, by= ). Can I use > that with a list of strings? > > Thanks, > Steven > > -----Original Message----- > From: Jim Lemon <drjimle...@gmail.com> > Sent: Thursday, July 11, 2019 7:46 PM > To: nst...@gmail.com; r-help mailing list <r-help@r-project.org> > Subject: Re: [R] Plotting in R > > Hi Steven, > It is pretty easy, but there are one or two things to watch for. > First, don't use a hyphen in a field name unless you enclose it in > single quotes when extracting it. I've just removed the hyphen in this > example: > > sydf<-read.table(text="year1 monthday rate > 1993 05-01 0.608 > 1994 06-01 0.622 > 1996 07-01 0.623 > 1998 08-01 0.647 > 2000 09-01 0.646 > 2002 10-01 0.625 > 2004 11-01 0.628 > 2006 12-01 0.685 > 2008 01-01 0.679 > 2010 02-01 0.595 > 2012 03-01 0.567 > 2014 04-01 0.599 > 2016 05-01 0.642 > 2018 06-01 0.685", > header=TRUE, > stringsAsFactors=FALSE) > sydf$date<-as.Date(paste(sydf$year1,sydf$monthday),"%Y %m-%d") > library(plotrix) > par(mar=c(6,4,4,2)) > plot(sydf$date,sydf$rate,type="b",xaxt="n") > staxlab(1,at=sydf$date,labels=sydf$monthday) > > Note that I have also added the stringsAsFactors argument to prevent > monthdate being read as a factor. I expected that the axis labels would be > crowded so I used the plotrix library to stagger the x-axis labels. Hope this > solves your problem. > > Jim > > On Fri, Jul 12, 2019 at 1:59 AM <nst...@gmail.com> wrote: > > > > Hi Jim, > > > > Thanks for your email. > > My question was: how to change the x axis labels without changing the chart. > > Or is that not possible? > > Using your example, I added another column: > > sydf<-read.table(text="year1 month-day rate > > 1993 05-01 0.608 > > 1994 06-01 0.622 > > 1996 07-01 0.623 > > 1998 08-01 0.647 > > 2000 09-01 0.646 > > 2002 10-01 0.625 > > 2004 11-01 0.628 > > 2006 12-01 0.685 > > 2008 01-01 0.679 > > 2010 02-01 0.595 > > 2012 03-01 0.567 > > 2014 04-01 0.599 > > 2016 05-01 0.642 > > 2018 06-01 0.685", > > header=TRUE) > > > > How can I show the column "month-day" as labels on the x axis, but > > still have the plot showing the chart as rate based on year? > > I tried this: > > plot(sydf$year,sydf$rate,type="b", > > xlab="month-day",ylab="Rate") > > > > but this only changes the title of the x axis to "month-day". I want > > the values on the x axis to show 05-01 06-01, etc. > > Is that possible? > > > > Thanks, > > Steven > > > > -----Original Message----- > > From: R-help <r-help-boun...@r-project.org> On Behalf Of Jim Lemon > > Sent: Sunday, July 7, 2019 2:59 AM > > To: Steven Yen <st...@ntu.edu.tw>; r-help mailing list > > <r-help@r-project.org> > > Subject: Re: [R] Plotting in R > > > > Hi Steven, > > A basic plot can be displayed like this: > > > > sydf<-read.table(text="year rate > > 1993 0.608 > > 1994 0.622 > > 1996 0.623 > > 1998 0.647 > > 2000 0.646 > > 2002 0.625 > > 2004 0.628 > > 2006 0.685 > > 2008 0.679 > > 2010 0.595 > > 2012 0.567 > > 2014 0.599 > > 2016 0.642 > > 2018 0.685", > > header=TRUE) > > plot(sydf$year,sydf$rate,type="b", > > xlab="Year",ylab="Rate") > > > > When you add more years and rates to the data frame, the axes will > > change to include the years and rates outside the ones in your > > example. As some have noted, this is a very basic question. > > > > Jim > > > > On Sat, Jul 6, 2019 at 11:33 PM Steven Yen <st...@ntu.edu.tw> wrote: > > > > > > I have a data frame containing two variables: year and rate (shown below). > > > Which function can I use to plot rate (y-axis) against year (x-axis)? > > > There will be more columns of rate later on. > > > Thank you. > > > > > > year rate 1 1993 0.608 2 1994 0.622 3 1996 0.623 4 1998 0.647 5 > > > 2000 > > > 0.646 6 2002 0.625 7 2004 0.628 8 2006 0.685 9 2008 0.679 10 2010 > > > 0.595 > > > 11 2012 0.567 12 2014 0.599 13 2016 0.642 14 2018 0.685 > > > > > > > > > -- > > > st...@ntu.edu.tw (S.T. Yen) > > > > > > > > > > > > --- > > > This email has been checked for viruses by Avast antivirus software. > > > https://www.avast.com/antivirus > > > > > > [[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. > > > > ______________________________________________ > > 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. > > > ______________________________________________ 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.