Dear Andrew,
Assuming your variables are called V1 to V4, and are vectors,
I'd use something like
plot(V1,V2,xlim=range(V1,V3),ylim=range(V2,V4),type="n")
segments(V1,V2,V3,V4)
HTH
Thomas
---
Thomas Hotz
Research Associate in Medical Statistics
University of Leicester
United Kingdom
Departm
[EMAIL PROTECTED] wrote:
> I have a data file read into a data frame.
>
> For example,
>
> V1 V2 V3 V4
> 1 1 1 3 4
> 2 2 3 5 10
> . . . . .
> . . . . .
> n V1[n] V2[n] V3[n] V4[n]
>
> to n=many thousand
>
is this stored as a data.frame? a
