Le 06/04/13 10:00, ZhaoXing a écrit :
Hi, all
I have a medium sized data, 6 years. Each observation is a case with a date
variable, such as '2004-08-02'.
Some of the months didn't occur a case.
I want to plot the 6 years data by month, and the Y_axis is the freqency of
cases for each month, meaning 12*6=72 bars or points in the figure.
I though of a method, 1st, using the months function, then ploting. But I need
to assign zero to the months without case. And a lot of other manipulations.
Is there any simpler way to complete this? or just a simple function exists?
Thanks in advance
ZhaoXing
______________________________________________
Do you want something like this ?
x <- seq(from=as.Date("2000-01-01"), to=as.Date("2006-12-31"), by="1 day")
y <- sin(1:length(x))+1
plot(x, y, bty="n", type="l", xaxt="n", las=1)
axis(1, at=seq(from=as.Date("2000-01-01"), to=as.Date("2006-12-31"),
by="1 month"), label=FALSE)
axis(1, at=seq(from=as.Date("2000-01-01"), to=as.Date("2006-12-31"),
by="1 year"), lwd.ticks=2, label=c(2000:2006))
Sincerely
Marc
--
__________________________________________________________
Marc Girondot, Pr
Laboratoire Ecologie, Systématique et Evolution
Equipe de Conservation des Populations et des Communautés
CNRS, AgroParisTech et Université Paris-Sud 11 , UMR 8079
Bâtiment 362
91405 Orsay Cedex, France
Tel: 33 1 (0)1.69.15.72.30 Fax: 33 1 (0)1.69.15.73.53
e-mail: marc.giron...@u-psud.fr
Web: http://www.ese.u-psud.fr/epc/conservation/Marc.html
Skype: girondot
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