par: numeric vector of length 11 with the PhenoFlex fit parameters in the following order: 1. yc, 2. zc, 3. s1, 4. Tu, 5. E0, 6. E1, 7, A0, 8. A1, 9. Tf, 10. Tc, 11. Tb and 12. slope. For details see PhenoFlex
A0: numeric. Parameter A0 of the dynamic model
A1: numeric. Parameter A1 of the dynamic model
E0: numeric. Parameter E0 of the dynamic model
E1: numeric. Parameter E1 of the dynamic model
slope: numeric. Slope parameter for sigmoidal function
Tf: numeric. Transition temperature (in degree Kelvin) for the sigmoidal function
Returns
A single numeric value with the JDay prediction for the temperaturs in x$Temp and the PhenoFlex parameters in par.