[R] Plot with Julian dates.
C. Park
cspark at ces.clemson.edu
Wed Aug 9 21:31:48 CEST 2006
Dear Sir/Madam:
I simply want to draw x-y plot with Julian dates (x) and numbers (y).
Please see below for my program.
In the older version of R, the plot(jdat, miles) worked without any problem.
But, with the new version of R, plot(jdat, miles) does not work any more.
So, I added log="" option (as far as I know, it is a default setting, so
log="" should not be needed).
Now, it works with log="" option. But it is weird to me.
I also check
plot( jdat, miles, log="", type="p")
The option type="p" is also a default. So it should be the same as
plot( jdat, miles, log=""). The figures are the same, but the one with
type="p" option yields a warning message.
Do you think it is a R bug?
Thanks for your valuable time.
C. Park
Note: I used the following R version
platform i686-redhat-linux-gnu
arch i686
os linux-gnu
system i686, linux-gnu
status
major 2
minor 3.1
year 2006
month 06
day 01
svn rev 38247
language R
version.string Version 2.3.1 (2006-06-01)
##=========================================
## Here is my program
##=========================================
library(survival)
dat = c( "12-5-1995", "12-30-1995", "8-27-1996", "11-20-1996", "8-29-1997",
"11-7-1997", "4-4-1998", "7-15-1998", "11-2-1998", "1-16-1999" )
miles = c(106, 1468, 7298, 7935, 13440, 14460, 17132, 20214, 22802, 24724 )
jdat = as.date(dat) ## Convert to Julian date form.
plot( jdat, miles ) ## Not working
Error in plot.window(xlim, ylim, log, asp, ...) :
"log=" specification must be character
plot( jdat, miles, log="" ) ## Works
plot( jdat, miles, log="", type="p") ## Works, but warning messages
Warning message:
graphical parameter "type" is obsolete in: axis(side, at, labels, tick, line,
pos, outer, font, lty, lwd,
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