Displaying 2 results from an estimated 2 matches for "risksetroc".
2011 Oct 10
3
How to test if two C statistics are significantly different?
Hey all,
In order to test if a marker is a risk factor, I built two models (using cox
proportional hazard model). One model included this marker, and the other is
not.
Then, I use R package risksetROC to test how much predictive value did the
marker add to this model. I get two C statistics by analyzing the linear
predictors of the two models into this package.
The qustion is How to test if two C statistics are significantly different?
Your help will be greatly appreciated!
Yujie
[[alternat...
2014 Jun 23
2
Resumen de R-help-es, Vol 64, Envío 33
...námicos (se repiten en intervalos para cada medida de FIshSpeed), y si lo que quieres es modelizar ROC dinámicas hay alternativas en R (pero este enfoque es mucho más complicado que el de ROC estática):
- el paquete survivalROC http://cran.r-project.org/web/packages/survivalROC/survivalROC.pdf
- y risksetROC http://cran.r-project.org/web/packages/risksetROC/risksetROC.pdf
El siguiente artículo sobre pROC está muy bien para ver las capacidades de la librería: http://www.biomedcentral.com/1471-2105/12/77
#### con tus datos
# Pon tu directorio de trabajo
setwd("C:/Users/pedroc/Downloads")
lis...