[R] a little (more) help needed plotting chron object

[Gabor Grothendieck]

I can't reproduce that.  When I use that s I do get 13 ticks as shown
below.  What version of chron and R are you using?

> plot(tv, yjunk, pch = yjl, xaxt = "n")
> s <- seq(0, 1, 1/12)
> out <- axis(1, s, substr(chron(s), 11, 15))
> out
 [1] 0.00000000 0.08333333 0.16666667 0.25000000 0.33333333 0.41666667
 [7] 0.50000000 0.58333333 0.66666667 0.75000000 0.83333333 0.91666667
[13] 1.00000000
>
> R.version.string # XP
[1] "R version 2.4.0 Patched (2006-10-24 r39722)"
>
> packageDescription("chron")$Version
[1] "2.3-9"

On 11/20/06, Randy Zelick <zelickr at pdx.edu> wrote:
> Hello Gabor,
>
> Thanks very much for your help. The solution you offered:
>
> >
> > plot(tv, yjunk, pch = yjl, xaxt = "n")
> > s <- seq(0, 1, .2)
> > axis(1, s, substr(chron(s), 11, 15))
> >
>
> does provide time labels, but I can't seem to get a time less than 8:00.
> For example, if I try
>
> s <- seq(0,1,(1/12)) and run chron on it, I get this OK result:
>
> [1] (01/01/70 00:00:00) (01/01/70 04:00:00) (01/01/70 08:00:00)
> [4] (01/01/70 12:00:00) (01/01/70 16:00:00) (01/01/70 20:00:00)
> [7] (01/02/70 00:00:00)
>
> I expected eight tics labeled 00:00, 04:00, etc. The axis command insists,
> however, in starting the xaxis no earlier than 8:00. Various adjustments
> of the range parameters do not seem to help.
>
> Perhaps 'axis' has a notion about spacing labels and I am fighting that,
> but then it was told via "s" where to put the tics!
>
> Thanks, again, in advance,
>
> =Randy=
>
> R. Zelick                               email: zelickr at pdx.edu
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