SStemp: self start for Collatz temperature response

SStemp3R Documentation

self start for Collatz temperature response

Description

Self starter for Collatz temperature response function

Usage

temp3(x, t.m, t.l, t.h)

SStemp3(x, t.m, t.l, t.h)

Arguments

x

input vector (x) which is normally ‘temperature’.

t.m

medium temperature

t.l

low temperature

t.h

high temperature

Details

Collatz GJ , Ribas-Carbo M Berry JA (1992) Coupled Photosynthesis-Stomatal Conductance Model for Leaves of C4 Plants. Functional Plant Biology 19, 519-538. https://doi.org/10.1071/PP9920519

Value

temp3: vector of the same length as x using a temp function

Examples


## A temperature response function
require(ggplot2)
set.seed(1234)
x <- 1:50
y <- temp3(x, 25, 13, 36) + rnorm(length(x), sd = 0.05)
dat1 <- data.frame(x = x, y = y)
fit1 <- nls(y ~ SStemp3(x, t.m, t.l, t.h), data = dat1)

ggplot(data = dat1, aes(x, y)) + 
  geom_point() + 
  geom_line(aes(y = fitted(fit1)))


nlraa documentation built on May 29, 2024, 2:01 a.m.