cutoff: cutoff for survival analysis

In onesand1/GRC: Gene regulation and correlation between target and pathway

Description

Desgin three method to identify the cutoff for survival analysis, including median, quartile and Youden index.

Usage

cutoff(data, type = "M", ttype = "d", cut = 1,plot=TRUE,file="Rplot")

Arguments

data	The data needs three columns: expression value, survival times and status. The status indicator, normally 0=alive, 1=dead. Other choices are TRUE/FALSE (TRUE = death) or 1/2 (2=death).
type	Type refers to the segmentation threshold of survival analysis, which is divided into three types: median(M), quartile (Q) and Youden index (Y).default type="M".
ttype	This parameter refers to the units of time, days(d), months(m), and years(y).default time='d'.
cut	This parameter is a threshold used when selecting type= "Y". marker values to use as a cut-off for calculation of sensitivity and specificity.
plot	A logical parameter. This parameter is defined to show whether the survival curve is visualized.default plot=TRUE.
file	The survival curve plot file name. The file type is .pdf.

Value

fit	a survfit object.
data	Added a group column for raw data.

Examples

##---- Should be DIRECTLY executable !! ----
##-- ==>  Define data, use random,
##--	or do  help(data=index)  for the standard data sets.

onesand1/GRC documentation built on Dec. 22, 2020, 1:38 a.m.