The problem is that you've instructed R to place lines at the values 91.55, 99.39, 97.04, 92.37 and 88.02, but these values do not correspond to the user coordinates of the x-axis (which you've specified to be dates).
Luckily, the dates where you need lines are in the rownames of zi. You do need to convert them to your user coordinates--and that depends on how plot decides to specify your user coordinates, which hinges on the range of your full data set (you clipped it). What's on your x-axis? Do par("usr") when you have one of the plots open and tell me what R says. Kevin -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Laura Holt Sent: Tuesday, June 29, 2004 2:06 PM To: [EMAIL PROTECTED] Subject: [R] abline and its objects Hi R People: Is there a way to put an abline line for its objects on a plot, please? I have an its object, ibm2, which runs from the January 2 through May 28. >ibm2 ibm 2004-01-02 91.55 2004-01-05 93.05 2004-01-06 93.06 2004-01-07 92.78 2004-01-08 93.04 2004-01-09 91.21 2004-01-12 91.55 2004-01-13 89.70 2004-01-14 90.31 2004-01-15 94.02 . . . I plot the data. No Problem. Now I extract the first day of the month in this fashion. >zi <- extractIts(ibm2,weekday=T,find="first",period="month") >zi ibm 2004-01-02 91.55 2004-02-02 99.39 2004-03-01 97.04 2004-04-01 92.37 2004-05-03 88.02 > Still ok. I would like to put a vertical line at each of the zi values. >abline(v=zi,type="h",col=2) >lines(zi,type="h",col=2) > Nothing happens. I tried creating another its object with NA in all but the zi places. Then I used lines(test1) Still nothing happened. Any suggestions would be much appreciated. R Version 1.9.1 Sincerely, Laura H mailto: [EMAIL PROTECTED] Married. http://lifeevents.msn.com/category.aspx?cid=married ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html