Yunus Balcioglu

import math

node = hou.pwd()
parm_path = node.evalParm("parm_ref")
parm = hou.parm(parm_path)
if parm is None:
    raise hou.NodeError("Bad parm path in parm_ref: " + parm_path)

N = 32
cycles = 1.0
phase = 0.0
amp = 0.5
offset = 0.5
decay = 0.0

keys = [i / (N - 1) for i in range(N)]
vals = []
for t in keys:
    y = math.sin(2.0 * math.pi * cycles * t + phase)
    y *= math.exp(-decay * t)
    vals.append(offset + amp * y)

basis = [hou.rampBasis.CatmullRom] * (N - 1)

r = hou.Ramp(basis, keys, vals)

parm.set(r)