.control section: atanh examples

examples/various/atanh.sp

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+atanh test for real and complex inputs
+v1 1 0 dc 0 ac 1
+r1 1 2 50
+c1 2 0 40f
+l1 2 3 50p
+c2 3 0 40f
+l2 3 4 50p
+r2 4 0 50
+.control
+* real numbers
+let invec = vector(1999)
+compose invec start=-0.999 stop=0.999 step=0.001
+let outvec = atanh(invec)
+setscale invec
+set xbrushwidth=3
+plot outvec
+ac dec 100 1g 100g
+let X=v(4); complex vector to be worked
+*complex numbers
+let Y1=X+X^3/3+X^5/5+X^7/7+X^9/9+X^11/11; pseudo atanh
+Let Y2 = atanh(X)
+plot polar Y1
+plot polar Y2
+plot polar Y1 Y2
+
+.endc
+.end