plot XY
 

Hi all,
I try to model the flow of compressible fluid through a pipe by using Fluent. I want to plot velocity as a function of pressure (velocity in Y axis function and pressure in X axis function); but in "plot XY" panel and in "X axis function" list we have just:
Direction vector and curve lengh.
So how can I include the pressure in "X axis function" list?
Thank you very mutch

There is a box on the left which says 'postion on x-axis'
uncheck it, and you can put anything you like on the x-axis

Thank you so mutch CeesH