' - - File:X1_Family4.txt
pi = 3.14159
r=.25                                                             ' Const ID to vary per curve. Note Z axis.
F<t> = <3*r*Cos[2*pi*t], 3*r* Sin[2*pi*t], 3*r >

Uz<t> = <0,0,t>                                        ' z-axis?  Need to create one.
t0 = -1  :  tf = 1  :  n = 100                        ' (Each circle is 2D plane; hence no Z-axis.)
Plot[F, Uz,{t, t0, tf,n}]

' Want a Z-axis display? Add Uz above and to the Plot command.
' Unlike animation, when the curve set is complete, you can zoom and change the
'    viewing angles.
' Check the scales. They, like the Zoom, angle of views, etc. carry over with each
'    session and may need to be reset.





