| pseu {funkcije} |
R Documentation |
Hazard regression models diagnostics
Description
A function for graphical and formal testing of the Cox and additive model
assumptions
Usage
pseu(formula, data,type=c("surv","cox","add"),resid,test,nt,pl,ylim,col,bins,linpred)
Arguments
formula |
a formula object, with the response (a Surv object) on
the left of a ~ operator, and the terms on the right. The
terms consist of predictor variables separated by the +
operator. The first predictor variable on the right hand side is the
covariate of interest - this is the covariate that will be plotted on the
x-axis (unless the linpred option is set to TRUE.) |
data |
a data.frame in which to interpret the variables named in the
formula. |
type |
type surv gives a nonparametric estimate of S(t|z), types
"cox" and "add" give plots on the scale of the linear predictor of the
chosen model. If the option resid=TRUE, the option
type defines the model used for calculating the predicted
survival used in the calculation of residuals. |
resid |
logical, default is FALSE. If set to TRUE,
the diagnostics are performed using the residuals. |
test |
logical, default is FALSE. If set to TRUE
test stastistics will be calculated. |
nt |
the number of chosen time points, the default is 3. |
pl |
logical, if TRUE (default) graphical diagnostics will be
performed |
ylim |
allows changing the y axis limits for the plots. |
col |
vector of colors for the subsequent curves representing the different
time points. Should be of the same length as nt. |
bins |
logical, if TRUE(default) the distribution of the
covariate is sketched on the bottom of the figure. |
linpred |
logical, default is FALSE. If set to TRUE
the graphs are plotted against the linear predictor instead of just one
covariate. |
Value
ps |
a matrix giving the values of the curves at each time point. Each
curve is stored in one column. The number of the columns equals the number
of the chosen time points |
time |
the time points chosen |
z |
the values of the covariate or the linear predictor |
test |
the test results, if the option test was set to
TRUE. |
Examples
library(survival)
data(pbc)
pseuu(Surv(timet,status)~bili,data=pbc,type="cox")
pseuu(Surv(timet,status)~bili,data=pbc,type="add")
pseuu(Surv(timet,status)~bili,data=pbc,type="cox",resid=T,ylim=c(-2,2))
pseuu(Surv(timet,status)~bili,data=pbc,type="add",resid=T,ylim=c(-2,2))
[Package
funkcije version 1.0
Index]