[R] Time on x-axis

[Sangeetha Swaminathan]

Hello,

   I just started using the GNU R. I am having trouble plotting my data. I am 
tryin to plot the following data:

TIMESTAMP    LOGIN-TIME 
(hh:mm:ss)          (s)

23:55:03       0.990972 
23:55:03       0.990972 
23:50:04       0.878968 
23:45:04       0.969271 
23:40:03       0.868848 
23:35:03        0.88141 
23:30:03       0.679571 
23:25:03       0.599834 
23:20:03       0.663436 
23:15:03       0.567414 
23:10:02       0.738379 
23:05:02       0.575764

with TIMESTAMP on the x-axis. The plot() function assumes the x-axis as the 
total number of events, and plots the desired graph. But I want the TIMESTAMP 
on the x-axis. If I try to change the x-axis, the y-axis gets modified too, 
and all I get is just a "dot" as a plot. 
Can someone tell me how I can make R plot my graph, with TIMESTAMP as my 
x-axis and LOGIN_TIME as my y-axis?

Thank you.

Sangeetha

-- Sangeetha Swaminathan
Graduate Assistant
Innovative Technology Center (ITC)
2444 Dunford Hall
The University of Tennessee
Knoxville, TN 37996
Phone [O]:(865) 974-9672
      [R]:(865) 946-4340