In Response To ' Re: contourplot help?'
As the previous message, your advice works pretty well. However I have one more question to ask. It may sound fool, but I actually don't know how.
The coordinates that were obtained from the command you suggested will be plenty. If I want to get the coordinates as I increase the value of y, each time by 0.1. For example, (x1,0), (x2,0.1),(x3,0.2), ...
What will be the values of x1, x2, and x3?