[R] Problems with labeling a set X axis in chron plots
somewhereond.earth at gmail.com
Tue Feb 17 02:08:56 CET 2009
I couldn't get your problem exactly, but if you are looking for dates on
x-axis, then try using
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
> 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
> PLEASE do read the posting guide
> and provide commented, minimal, self-contained, reproducible code.
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