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How to show complete time values in a plot x axis

5 messages · Sébastien Durand, Yihui Xie, Duncan Murdoch

Sébastien Durand
# 
Hello,

I have the following data and I try to properly
import it in R and plot the 4th column relative to time

    1   2008-249 17:44:17.973    -2.27  00000000: Accepted
    2   2008-249 17:44:18.014    -2.28  00000000: Accepted
    3   2008-249 17:44:18.064    -2.29  00000000: Accepted
    4   2008-249 17:44:18.123    -2.29  00000000: Accepted
    5   2008-249 17:44:18.174    -2.29  00000000: Accepted
    6   2008-249 17:44:18.225    -2.29  00000000: Accepted
    7   2008-249 17:44:18.274    -2.28  00000000: Accepted
    8   2008-249 17:44:18.325    -2.28  00000000: Accepted
    9   2008-249 17:44:18.375    -2.28  00000000: Accepted
   10   2008-249 17:44:18.424    -2.27  00000000: Accepted
   11   2008-249 17:44:18.475    -2.26  00000000: Accepted
   12   2008-249 17:44:18.514    -2.24  00000000: Accepted
   13   2008-249 17:44:18.565    -2.23  00000000: Accepted
   14   2008-249 17:44:18.615    -2.20  00000000: Accepted
   15   2008-249 17:44:18.674    -2.17  00000000: Accepted
   16   2008-249 17:44:18.725    -2.15  00000000: Accepted
   17   2008-249 17:44:18.774    -2.12  00000000: Accepted
   18   2008-249 17:44:18.825    -2.09  00000000: Accepted
   19   2008-249 17:44:18.875    -2.06  00000000: Accepted
   20   2008-249 17:44:18.925    -2.03  00000000: Accepted
   21   2008-249 17:44:18.975    -2.00  00000000: Accepted
   22   2008-249 17:44:19.026    -1.97  00000000: Accepted
   23   2008-249 17:44:19.055    -1.95  00000000: Accepted

#I copy the previous data then in R 
dat=readLines("clipboard")
options(digits.secs=6)
tmp=unlist(lapply(dat,function(x){unlist(strsplit(x,"\\ 
+",perl=TRUE))[3:5]}))
tmp=matrix(tmp,ncol=3,byrow=TRUE)
tmp=cbind(paste(tmp[,1],tmp[,2]),tmp[,3])
time=strptime(tmp[,1], format="%Y-%j %H:%M:%OS")
value=as.numeric(tmp[,2])
plot(time,value)
#How can I show in the x axis the complete time values including the 
decimals.

Thanks a lot

N.B.: I am running the lastest version of R and using it under Windows XP

S.
Yihui Xie
# 
Hi, I'd suggest you use dotchart() instead of plot(). I believe this
is what you expected:

dotchart(value, time)

Regards,
Yihui
--
Yihui Xie <xieyihui at gmail.com>
Phone: +86-(0)10-82509086 Fax: +86-(0)10-82509086
Mobile: +86-15810805877
Homepage: http://www.yihui.name
School of Statistics, Room 1037, Mingde Main Building,
Renmin University of China, Beijing, 100872, China



On Fri, Sep 19, 2008 at 3:10 AM, S?bastien Durand
<sebastien.durand at cidco.ca> wrote:
Sébastien Durand
# 
Dear Yihui,

The resulting plot produced by dotchart is not what I wish for!
I need to produce a time axis that is consequent to the time values.
When dotchart is used, time values are simply considered as labels.
What I wish for is a way to produce a numerical time axis that really 
takes into account the given time values. With plot I have been able to 
do so, the only issue is the labelling.
I wish to represent the complete time on the axis ticks...

Cheers

S?bastien Durand
CIDCO

Yihui Xie a ?crit :
Duncan Murdoch
#
On 9/19/2008 9:14 AM, S?bastien Durand wrote:
Ask plot not to produce an axis, then construct the labels yourself and 
add them.  The axis.POSIXct() function will be helpful in this.

Duncan Murdoch
Yihui Xie
# 
Sorry, I thought the time values were equal-spaced...

Regards,
Yihui
--
Yihui Xie <xieyihui at gmail.com>
Phone: +86-(0)10-82509086 Fax: +86-(0)10-82509086
Mobile: +86-15810805877
Homepage: http://www.yihui.name
School of Statistics, Room 1037, Mingde Main Building,
Renmin University of China, Beijing, 100872, China



On Fri, Sep 19, 2008 at 3:10 AM, S?bastien Durand
<sebastien.durand at cidco.ca> wrote: