[R] How to plot dates

[Gregory Coats]

Thank you very much.
In addition to what your did, for event 1, I would like to draw a horizontal line connecting from day 1 to day 2 to day 3 to day 4.
Then, for event 2, I would like to draw a horizontal line connecting from day 1 to day 2 to day 3 to day 4.
Similarly for events 3, and 4. Is that convenient to do?
Greg Coats

> On Mar 16, 2021, at 8:01 PM, Avi Gross via R-help <r-help using r-project.org> wrote:
> 
> Here is an example that worked for me doing roughly what I mentioned but
> note my names changed. It makes two plots.
> 
> library (ggplot2)
> myDat <- read.table(text =
>                      "datetimeraw
> 2021-03-12 05:16:46
> 2021-03-12 09:17:02
> 2021-03-12 13:31:43
> 2021-03-12 22:00:32
> 2021-03-13 09:21:43
> 2021-03-13 13:51:12
> 2021-03-13 18:03:13
> 2021-03-13 22:20:28
> 2021-03-14 08:59:03
> 2021-03-14 13:15:56
> 2021-03-14 17:25:23
> 2021-03-14 21:36:26",
>                    sep = ",", header = TRUE)
> head(myDat)
> myDat$datetime <- as.POSIXct(myDat$datetimeraw, tz = "", format ="%Y-%M-%d
> %H:%M:%OS")
> myDat$date <- factor(format(myDat$datetime, "%Y-%m-%d"))
> myDat$time <- format(myDat$datetime, "%H:%M")
> myDat$seq <- factor(rep(1:4, 3))
> 
> # just dots
> ggplot(data=myDat,aes(x=date, y=time)) + geom_point(aes(color=seq))
> 
> # Also text
> ggplot(data=myDat,aes(x=date, y=time, label=time)) + 
>  geom_point(aes(color=seq)) + 
>               geom_text(aes(color=seq))

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