R help - Sep 2000 - How to make the plot when x columns are string list?

Dear R users:

I have to plot the data set like the following.
x <- c("05/27/00","06/03/00","08/22/00",...)
y <- c(10,20,15,...)

But plot(x,y,...) do not work!!
How can i get the proper plot in this kinds of situation.
Sorry for kinds of simple question!!

best regards,
Shawn Lee
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On Fri, 1 Sep 2000, Shawn Lee wrote:
> Dear R users:
> 
> I have to plot the data set like the following.
> x <-
c("05/27/00","06/03/00","08/22/00",...)
> y <- c(10,20,15,...)
> 
> But plot(x,y,...) do not work!!
> How can i get the proper plot in this kinds of situation.
You need to tell R that x is a date (or at least I presume that is what you
intend).  There are a couple of ways to do this, using packages date and
chron (both on CRAN). Here is one using chron.

library(chron)
x <- dates(c("05/27/00","06/03/00","08/22/00"))
y <- c(10,20,15)
plot(x, y)

which will work if you were in the USA and your first string means 2000 May
27, 2000-05-27 in ISO 8601 date format.  (R 1.2.0 will have facilties to
read those as well as US and European shorthands.)

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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Shawn Lee wrote:
> 
> Dear R users:
> 
> I have to plot the data set like the following.
> x <-
c("05/27/00","06/03/00","08/22/00",...)
> y <- c(10,20,15,...)
> 
> But plot(x,y,...) do not work!!
> How can i get the proper plot in this kinds of situation.
> Sorry for kinds of simple question!!
You should try the package "date", available at CRAN.
Example:

 library(date)
 x <-
as.date(c("05/27/2000","06/03/2000","08/22/2000"))
 y <- c(10,20,15)
 plot(x,y)

Uwe Ligges
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r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at
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