Christopher W Ryan
2018-May-01 21:00 UTC
[R] How would I color points conditional on their value in a plot of a time series
Excellent! Worked like a charm. Thanks. --Chris Ryan On Tue, May 1, 2018 at 4:33 PM, William Dunlap <wdunlap at tibco.com> wrote:> The ts method for plot() is quirky. You can use the default method: > > plot(as.vector(time(ttt)), as.vector(ttt), type = "p", col=ifelse(ttt<8, > "black", "red")) > > > Bill Dunlap > TIBCO Software > wdunlap tibco.com > > On Tue, May 1, 2018 at 1:17 PM, Christopher W Ryan <cryan at binghamton.edu> > wrote: > >> How would I color points conditional on their value in a plot of a time >> series. Something like this: >> >> ## demonstration data >> ttt <- ts(rpois(12, lambda = 8), start = c(2000, 1), freq = 4) >> ttt >> plot(ttt, type = "p") >> >> ## doesn't work--all points the same color >> plot(ttt, type = "p", col = ifelse(ttt < 8, "black", "red")) >> >> ## also doesn't work--all points the same color >> q <- as.numeric(ttt) >> q >> plot(ttt, type = "p", col = ifelse(q < 8, "black", "red")) >> >> >> ## works OK with a simple, non-time-series scatterplot, as in >> >> sss <- data.frame(x = rpois(12, lambda = 8), y = rnorm(12, mean = 100, sd >> >> 25)) >> with(sss, plot(y ~ x, col = ifelse(y > 100, "black", "red"))) >> >> ## but I am missing something about time series. >> >> Thanks. >> >> --Chris Ryan >> Broome County Health Department >> and Binghamton University >> Binghamton, NY >> >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> R-help at 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/posti >> ng-guide.html >> and provide commented, minimal, self-contained, reproducible code. >> > >[[alternative HTML version deleted]]
Eivind K. Dovik
2018-May-01 21:18 UTC
[R] How would I color points conditional on their value in a plot of a time series
You may also want to check this out: plot(ttt, type = "p") points(ttt, col = ifelse(ttt < 8, "black", "red")) Eivind K. Dovik Bergen, NO On Tue, 1 May 2018, Christopher W Ryan wrote:> Excellent! Worked like a charm. Thanks. > > --Chris Ryan > > On Tue, May 1, 2018 at 4:33 PM, William Dunlap <wdunlap at tibco.com> wrote: > >> The ts method for plot() is quirky. You can use the default method: >> >> plot(as.vector(time(ttt)), as.vector(ttt), type = "p", col=ifelse(ttt<8, >> "black", "red")) >> >> >> Bill Dunlap >> TIBCO Software >> wdunlap tibco.com >> >> On Tue, May 1, 2018 at 1:17 PM, Christopher W Ryan <cryan at binghamton.edu> >> wrote: >> >>> How would I color points conditional on their value in a plot of a time >>> series. Something like this: >>> >>> ## demonstration data >>> ttt <- ts(rpois(12, lambda = 8), start = c(2000, 1), freq = 4) >>> ttt >>> plot(ttt, type = "p") >>> >>> ## doesn't work--all points the same color >>> plot(ttt, type = "p", col = ifelse(ttt < 8, "black", "red")) >>> >>> ## also doesn't work--all points the same color >>> q <- as.numeric(ttt) >>> q >>> plot(ttt, type = "p", col = ifelse(q < 8, "black", "red")) >>> >>> >>> ## works OK with a simple, non-time-series scatterplot, as in >>> >>> sss <- data.frame(x = rpois(12, lambda = 8), y = rnorm(12, mean = 100, sd >>> >>> 25)) >>> with(sss, plot(y ~ x, col = ifelse(y > 100, "black", "red"))) >>> >>> ## but I am missing something about time series. >>> >>> Thanks. >>> >>> --Chris Ryan >>> Broome County Health Department >>> and Binghamton University >>> Binghamton, NY >>> >>> [[alternative HTML version deleted]] >>> >>> ______________________________________________ >>> R-help at 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/posti >>> ng-guide.html >>> and provide commented, minimal, self-contained, reproducible code. >>> >> >> > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at 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. >
Martin Maechler
2018-May-02 08:01 UTC
[R] How would I color points conditional on their value in a plot of a time series
>>>>> Eivind K Dovik <hello at eivinddovik.com> >>>>> on Tue, 1 May 2018 23:18:51 +0200 writes:> You may also want to check this out: > plot(ttt, type = "p") > points(ttt, col = ifelse(ttt < 8, "black", "red")) > Eivind K. Dovik > Bergen, NO yes, indeed, or -- even nicer for a time series: using 'type = "c"' which many people don't know / have forgotten about: ttt <- ts(rpois(12, lambda = 8), start = c(2000, 1), freq = 4) plot (ttt, type = "c") points(ttt, col = ifelse(ttt < 8, "black", "red")) Martin Maechler > On Tue, 1 May 2018, Christopher W Ryan wrote: >> Excellent! Worked like a charm. Thanks. >> >> --Chris Ryan >> >> On Tue, May 1, 2018 at 4:33 PM, William Dunlap <wdunlap at tibco.com> wrote: >> >>> The ts method for plot() is quirky. You can use the default method: >>> >>> plot(as.vector(time(ttt)), as.vector(ttt), type = "p", col=ifelse(ttt<8, >>> "black", "red")) >>> >>> >>> Bill Dunlap >>> TIBCO Software >>> wdunlap tibco.com >>> >>> On Tue, May 1, 2018 at 1:17 PM, Christopher W Ryan <cryan at binghamton.edu> >>> wrote: >>> >>>> How would I color points conditional on their value in a plot of a time >>>> series. Something like this: >>>> >>>> ## demonstration data >>>> ttt <- ts(rpois(12, lambda = 8), start = c(2000, 1), freq = 4) >>>> ttt >>>> plot(ttt, type = "p") >>>> >>>> ## doesn't work--all points the same color >>>> plot(ttt, type = "p", col = ifelse(ttt < 8, "black", "red")) >>>> >>>> ## also doesn't work--all points the same color >>>> q <- as.numeric(ttt) >>>> q >>>> plot(ttt, type = "p", col = ifelse(q < 8, "black", "red")) >>>> >>>> >>>> ## works OK with a simple, non-time-series scatterplot, as in >>>> >>>> sss <- data.frame(x = rpois(12, lambda = 8), y = rnorm(12, mean = 100, sd >>>> >>>> 25)) >>>> with(sss, plot(y ~ x, col = ifelse(y > 100, "black", "red"))) >>>> >>>> ## but I am missing something about time series. >>>> >>>> Thanks. >>>> >>>> --Chris Ryan >>>> Broome County Health Department >>>> and Binghamton University >>>> Binghamton, NY >>>> >>>> [[alternative HTML version deleted]] >>>> >>>> ______________________________________________ >>>> R-help at 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/posti >>>> ng-guide.html >>>> and provide commented, minimal, self-contained, reproducible code. >>>> >>> >>> >> >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> R-help at 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 at 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.
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