`R/j_calculations.R`

`j_calculations.Rd`

Inverse non-rectangular hyperbola for J_max calculation

```
calculate_jmax(PPFD, alpha, J, theta_J)
calculate_j(PPFD, alpha, J_max, theta_J)
```

- PPFD
light intensity in umol m-2 s-1

- alpha
initial slope of the light response

- J
electron transport rate in umol m-2 s-1

- theta_J
curvature of the light response

- J_max
maximum rate of electron transport in umol m-2 s-1

calculate_jmax calculates J_max given PPFD and J. It is necessary for the electron transport component of the fit_aci_response function.

calculate_j provides a model of the light response of J. It is necessary for fitting the electron transport component of the photosynthetic CO2 response curves in fit_aci_response.