cluster	Identify clusters
coxph	Proportional Hazards Regression 
coxph.detail	Details of a cox model fit 
coxph.object	Proportional Hazards Regression Object   This class of objects is returned by the `coxph' class of functions to represent a fitted proportional hazards model.   Objects of this class have methods for the functions `print', `summary', `residuals', `predict' and `survfit'. 
coxph.rvar	Robust variance for a Cox model 
cox.zph	Test the proportional hazards assumption 
is.ratetable	Is an Object of Class ``ratetable''?
lines.survfit	Add lines to a survival plot 
plot.cox.zph	Graphical test of proportional hazards 
plot.survfit	Plot method for survfit. 
print.survfit	Short summary of a survival curve 
pyears	Person Years 
residuals.coxph	Calculate residuals for a coxph fit. 
residuals.survreg	Compute Residuals for `survreg' Objects 
rowsum	Give row sums of a matrix, based on a grouping variable. 
strata	Identify strata variables. 
summary.survfit	Print a Survival Curve 
Surv	Package a survival variable 
survdiff	Test Survival Curve Differences 
survexp	Compute Expected Survival 
survexp.fit	Compute expected survival 
survexp.us	Census data sets for the expected survival and person years functions   
survfit	Compute a survival Curve for Censored Data 
survfit.object	Parametric Survival Model Object   This class of objects is returned by the `survfit' class of functions to represent a fitted survival curve.   Objects of this class have methods for the functions `print', `summary', `plot', `points' and `lines'. 
survobrien	Peter O'Brien's test for association of a single variable with survival 
survreg	Regression for a parametric survival model 
survreg.object	Parametric Survival Model Object   This class of objects is returned by the `survreg' function to represent a fitted parametric survival model. Class `survreg' inherits from class `glm', since it is fit by iterative reweighted least squares; the object returned has all the components of a weighted least squares object.   Objects of this class have methods for the functions `print', `summary', `predict', and 'residuals'. 
survsum	Kaplan-Meier survival curve and percentages at selected times 
untangle.specials	Help process the 'specials' argument of the terms function. 
