[R] how to draw a vertical line from points to x-axis

2008-09-07 Thread Anny Huang
Hello, I want to know how to draw a line connecting each point to the x-axis perpendicularly (i.e. a vertical line). abline(v=...) seems not to work for my purpose, because it runs over the data point. Can anyone help? Thanks. Anny [[alternative HTML version deleted]] __

Re: [R] how to draw a vertical line from points to x-axis

2008-09-07 Thread Peter Alspach
ptember 2008 8:49 a.m. > To: r-help@r-project.org > Subject: [R] how to draw a vertical line from points to x-axis > > Hello, > > I want to know how to draw a line connecting each point to > the x-axis perpendicularly (i.e. a vertical line). > abline(v=...) seems not to wor

Re: [R] how to draw a vertical line from points to x-axis

2008-09-07 Thread Barry Rowlingson
2008/9/7 Anny Huang <[EMAIL PROTECTED]>: > Hello, > > I want to know how to draw a line connecting each point to the x-axis > perpendicularly (i.e. a vertical line). > abline(v=...) seems not to work for my purpose, because it runs over the > data point. Can anyone help? Thanks. > If your x-axis

Re: [R] how to draw a vertical line from points to x-axis

2008-09-08 Thread Nair, Murlidharan T
On Behalf Of Anny Huang > Sent: Monday, 8 September 2008 8:49 a.m. > To: r-help@r-project.org > Subject: [R] how to draw a vertical line from points to x-axis > > Hello, > > I want to know how to draw a line connecting each point to > the x-axis perpendicularly (i.e. a verti

Re: [R] how to draw a vertical line from points to x-axis

2008-09-08 Thread Adam D. I. Kramer
I think you want the ?lines function. To connect a point (x,y) to the x-axis, lines(x=c(x,x),y=c(y,0)) ...draws a line from that point to the x-axis. You may also want to specify pch=c(?,""),type="b" where ? is the original point type (which you don't want to "run over") and "" is the pch for t