[R] Plotting a graph of many lines between groups of points...

[Andrew Johnson]

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

I want to plot a graph with many line segments, where v1[i]=x1, v2[i]=y1, 
v3[i]=x2, v4[i]=y2 for i=1,n.

This seems relatively simple in theory but I've spent quite a bit of time 
trying to make it happen with plot(type=), points(x,y), or lines(x,y) to no 
avail.

Do I need to turn these into vectors before plotting them?

Any help would be greatly appreciated.

Thanks,
Andrew