**vxvar=***vx-expression*- The value of
*vx-expression*is plotted determines the length of the vector along the X axis.*vx-expression*is a real-valued C language expression over the real values**x**,**y**,**z**,**vx**,**vy**,**vz**,**phi**,**t**, and the integer value**i**. The default is**vx**. **vyvar=***y-expression*- See above. The default is
**vy**. **scale=***factor*- The factor with which each vector
is multiplied to make unit velocity come out as 1/20 (1cm for
*yapp*) of the plot. [Default is**1**].

4-oct-95V1.0 cloned from snapplotPJT