python (65.2k questions)

javascript (44.3k questions)

reactjs (22.7k questions)

java (20.8k questions)

c# (17.4k questions)

html (16.3k questions)

r (13.7k questions)

android (13k questions)

Questions - desolve

ODE-based nonlinear least square in R

I have to set a nonlinear least square regressor on a function that comes from the integration of an ode. Something like #rm(list=ls()) library(deSolve) set.seed(1) # for reproducibility t = seq(0,2*...
test-img

Fabio

r

nls

desolve

Votes: 0

Answers: 1

Latest Answer

You should apply the following corrections f = function(t, p) { # de integrated (times = c(0, t) to ensure first time = 0) ode(y = c(x = 0), func = dxdt, times = c(0, t), parms = p )[-1, 2] } sol ...
test-img

Meysam

Using dede from the R deSolve/FME packages to fit data to a compartment model

I'm trying to fit the tetracycline data set from Bates & Watts to a compartment model which forms a system of first order differential equations. The system has an analytic solution but I want to ...
test-img

NegativeBinomial

r

desolve

Votes: 0

Answers: 0

Compiled C ODE gives different results to R's using deSolve

I have an ODE which I would like to solve using compiled C code called from R's deSolve package. The ODE in question is I an exponential decay model (y'=-d* exp(g* time)*y): But running the compiled c...
test-img

HCAI

r

c

desolve

Votes: 0

Answers: 1

Latest Answer

Compiled code does not give different results to deSolve models implemented in R, except potential rounding errors within the limits of atoland rtol. The reasons of the differences in the original pos...
test-img

tpetzoldt

Initial state starts at y(1), how to go backwards to find y(0)?

I have set up a differential equation using the deSolve package and ode-function in R. I have the values for y(1), however I need to find y(0). Is there any function in R that allows me to calculate b...
test-img

Mandy94

r

reverse

ode

desolve

Votes: 0

Answers: 0

Posts

Questions

Blogs

Jobs