| Library: | hazreg |
| See also: | hazdat hazrisk |
| Quantlet: | haznar | |
| Description: | calculates the size of the risk set at each points of the censord survival time data. |
| Usage: | nar = haznar(data) | |
| Input: | ||
| data | n x (p+4) matrix, column 1: the sorted observed survival time t, column 2: the cosorted censoring indicator delta, column 3: labels l, column 4: number of ties at time t[i], cosorted, columns 5 to p+4: the cosorted covariate matrix z. | |
| Output: | ||
| nar | n x 1 vector, the ith entry is the size of the risk set at time t_i. | |
library("hazreg")
y = -log(1-uniform(20)) ; exponential survival
c = 2*uniform(20) ; uniform censoring
t = min(y~c,2) ; censored time
delta =(y<=c) ; censoring indicator
{data,ties} = hazdat(t,delta) ; preparing data
nar = haznar(data) ; calculating the
number at risk
The size of each risk set is listed as a vector in same order of the sorted data.
library("hazreg")
y = 2|1|3|2|4|7|1|3|2 ; hypothetical survival
c = 3|1|5|6|1|6|2|4|5 ; hypothetical censoring
t = min(y~c,2) ; censored time
delta =(y<=c) ; censoring indicator
{data,ties} = hazdat(t,delta)
; preparing data
nar = haznar(data) ; calculating the number
at risk
The same risk set size vector, but this time there are ties in the vector: three 9's, three 6's, two 3's.