Displaying 7 results from an estimated 7 matches similar to: "Error message from flexsurvreg"
2013 Jun 03
0
interpretation of flexsurvreg output from flexsurv package
Dear all,
I am fitting a parametric regression model to survival data using the
flexsurvreg function from the flexsurv package. I am using a Gompertz
distribution (a 2-parameter distribution) to describe the hazard function
and I want to compare two groups. The model is very simple:
flexsurvreg(formula = Surv(day, censored) ~ group, dist = "gompertz")
and the output is also quite
2006 Feb 13
2
Sweave, mle and curve
I am trying to write a lesson on maximum likelihood with Sweave. I get
a surprising result with the following code, lec4.Snw:
\documentclass[a4paper,12pt]{article}
\usepackage[latin1]{inputenc}
\title{Maximum likelihood}
\author{G伱伓ran Brostr伱伓m}
\begin{document}
\maketitle
<<fig=TRUE>>=
## Simulate Y:
n <- 25
Y <- sum(rpois(n, lambda = 1))
Y
## Define minusloglik:
2011 Apr 28
1
DLSODA error
Dear R-users,
I'm running an MLE procedure where some ODEs are solved for each iteration
in the maximization process. I use mle2 for the Maximum likelihood and
deSolve for the ODEs.
The problem is that somewhere along the way the ODE solver crashes and I get
the following error message:
DLSODA- Warning..Internal T (=R1) and H (=R2)
are
such that in the machine, T + H = T on the next
2013 Jan 24
0
Royston Parmar adjusted survival curves using flexsurv
Dear R
I am trying to understand and use the flexible parametric survival model
suggested by Royston and Parmar.
However I am stuck trying to plot the adjusted survival curves for
different covariates in the following code:
library(flexsurv)
library(graphics)
spl <- flexsurvspline(Surv(futime, fustat) ~ rx+ecog.ps+resid.ds+age, data
= ovarian, k=2, scale="odds")
spl
the code
2012 Nov 15
2
survreg & gompertz
Hi all,
Sorry if this has been answered already, but I couldn't find it in the
archives or general internet.
Is it possible to implement the gompertz distribution as
survreg.distribution to use with survreg of the survival library?
I haven't found anything and recent attempts from my side weren't
succefull so far.
I know that other packages like 'eha' and
2020 Jun 04
2
mclust package installation is preparing for lazy loading and never finishes
Hi,
After loading R 4.0.0 on Ubuntu 20.04.
R version 4.0.0 (2020-04-24) -- "Arbor Day"
Copyright (C) 2020 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)
R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()'
2010 Jul 27
0
AIC from coxme
Hi,
I am running the following model:
fit1.full <- coxme(Surv(age_sym1, sym1) ~ sex + lifedxm*sex + (1|famid),
data=bip.surv)
I would like to extract the AIC from that object to calculate the AICC.
However, when I look at str(fit1.full) and summary(fit1.full) (pasted
below) I don't see anything that would allow me to get pull the AIC out
from that object.
Is there a way to retrieve the