vollenweider_generate_regression_ETR_I {pam} | R Documentation |
Vollenweider Regression for ETR I
Description
Fits the Vollenweider (1965) regression model using original naming conventions from the publication.
Usage
vollenweider_generate_regression_ETR_I(
data,
pmax_start_value = vollenweider_default_start_value_a,
a_start_value = vollenweider_default_start_value_a,
alpha_start_value = vollenweider_default_start_value_alpha,
n_start_value = vollenweider_default_start_value_n
)
Arguments
data |
A |
pmax_start_value |
Numeric. Initial value for |
a_start_value |
Numeric. Initial value for |
alpha_start_value |
Numeric. Initial value for |
n_start_value |
Numeric. Initial value for |
Details
A detailed documentation can be found under https://github.com/biotoolbox/pam?tab=readme-ov-file#vollenweider_generate_regression_etr_i-and-vollenweider_generate_regression_etr_ii.
Value
A list containing:
-
etr_regression_data
: Predicted ETR values. -
sdiff
: Deviation between actual and predicted ETR. -
pmax
: Maximum electron transport rate (p_{max}
). -
a
: Parametera
. -
alpha
: Parameter\alpha
. -
n
: Parametern
. -
popt
: Maximum electron transport rate with photoinhibition (p_{opt}
). -
ik
: Transition point from light limitation to light saturation without photoinhibition (I_k
). -
iik
: Transition point from light limitation to light saturation with photoinhibition (I_k^\prime
). -
pmax_popt_and_ik_iik_ratio
: Ratio ofp_{max}
top_{opt}
andI_k
toI_k^\prime
.
References
Vollenweider, R. A. (1965). Calculation models of photosynthesis-depth curves and some implications regarding day rate estimates in primary production measurements, p. 427-457. In C. R. Goldman [ed.], Primary Productivity in Aquatic Environments. Mem. Ist. Ital. Idrobiol., 18 Suppl., University of California Press, Berkeley.
Examples
path <- file.path(system.file("extdata", package = "pam"), "20240925.csv")
data <- read_dual_pam_data(path)
result <- vollenweider_generate_regression_ETR_I(data)