[R] Problems with labeling a set X axis in chron plots

[Gabor Grothendieck]

Date class does not support times.  See R News 4/1 for
a discussion of the difference between different
classes.

On Mon, Feb 16, 2009 at 8:08 PM, somewhereondearth
<somewhereond.earth at gmail.com> wrote:
>
> HI,
>
> I couldn't get your problem exactly, but if you are looking for dates on
> x-axis, then try using
> axis.Date() option.
>  you can give the weekly, daily sequence if you like.( I am trying for a
> 6-hour sequence, but hasn't got it yet).
>
>
>
> Neotropical bat risk assessments wrote:
>>
>> I am having difficulties getting the X-axis labels (dates) to be as
>> needed when plotting from chron
>>
>> The help syntax from chron lists this example:
>>
>> x <- chron(dates = c("02/27/92", "02/27/92", "01/14/92", "02/28/92"),
>>
>>
>> I have activity plots by time on the y-axis and the dates on the
>> x-axis. What I need/want is that the dates remain the same for a give
>> set of data i.e. 10/25/2006 to 03/30/2007 as with some data sets
>> within this time frame there is no activity for all of the dates so
>> each plot has a different set of dates.
>>
>>
>> Below works great but when I try to constrain the dates it crashes...
>>
>> DF <- read.table(textConnection(Lines), header = TRUE, as.is = TRUE)
>> DF$Date <- chron(DF$Date)
>> DF$Time <- times(paste(DF$Time, 0, sep = ":"))
>> at <- c(0, 1, 2, 3, 4, 5, 6, 17, 18, 19, 20, 21, 22, 23, 24)
>> plot(Time ~ Date, DF, ylim = 0:1, yaxt = "n",main= "Centronycteris
>> centralis")
>> axis(2, at/24, lab = paste(at, "00", sep = ":"), las = 1, cex.axis = .7)
>>
>> Thanks to all here on the group,
>>
>> Bruce Miller
>>
>> ______________________________________________
>> R-help at r-project.org mailing list
>> 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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>
> ______________________________________________
> R-help at r-project.org mailing list
> 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.
>