Decode poly back to scalar
poly (Poly) – poly to be decoded with attibute keyfor = (‘e^{kt}’,’t’,’k^{-}’,’v0-theta’,’theta’,’sigma’, ‘l_{1:n}’, ‘o_{1:n}’, ‘sigma/2k’,’rho-sigma/2k’,’sqrt(1-rho^2)’, ‘sigma_s’)
keyfor
par (dict) – parameters in dict, jumptime (tuple) and jumpsize (tuple) must also be included
jumptime
jumpsize
scalar of the poly
float