embryogrowth (version 6.4)

dydt.linear: Return the derivative of the linear function

Description

Return the derivative of the linear function dydt.linear(t, size, parms)

Usage

dydt.linear(t, size, parms)

Arguments

t

The time in any unit

size

The current size

parms

A vector with alpha being c(alpha=x1, K=x2). Only alpha is used.

Value

A list with the derivative

Details

dydt.Linear returns the derivative of the linear function.

Examples

## Not run: 
# library(embryogrowth)
# data(nest)
# formated <- FormatNests(nest)
# # The initial parameters value can be:
# # "T12H", "DHA",  "DHH", "Rho25"
# # Or
# # "T12L", "DT", "DHA",  "DHH", "DHL", "Rho25"
# x <- structure(c(306.174998729436, 333.708348843241, 299.856306141849,  
# 	149.046870203155), .Names = c("DHA", "DHH", "T12H", "Rho25"))
# # K or rK are not used for dydt.linear or dydt.exponential
# resultNest_4p_linear <- searchR(parameters=x, fixed.parameters=NULL,  
# 	temperatures=formated, derivate=dydt.linear, M0=1.7,  
# 	test=c(Mean=39.33, SD=1.92))
# ## End(Not run)