XVAR, N
Specifies the X variable to be displayed.
NX variable number:       
0 or 1  |  —   | Display PLVAR values
vs. time (or frequency).  | 
n
  |  —   | Display PLVAR values
vs. variable n (2 to NV (NUMVAR)).  | 
1  |  —   | Interchange time and PLVAR variable
numbers with time as the curve parameter.  PLVAR variable
numbers are displayed uniformly spaced along X-axis from position 1 to 10.  | 
Command Default
Use time or frequency.
Notes
Defines the X variable (displayed along the abscissa) against which the Y variable(s)
   (PLVAR) are to be displayed.