' - - File: XI_Family1.txt
' Repeat File IIIPolar1.txt  and construct a set of curves changing one parameter.

cx=.25                                           ' Our ID constant to vary per each curve.
pi = 3.14159                                 ' Try .25 --> 3 range and 5 curves for starters.

R{t} = cx + Cos[2*pi*t]

X{t} = 4*R{t} * Cos[2*pi*t]
Y{t} = 4*R{t} * Sin[2*pi*t]

F<t> = <X, Y,0>   
t0 = -1  :  tf = 1  :  n = 500
Plot[F,{t, t0, tf, n}]





