Displaying 1 result from an estimated 1 matches for "pri_cas_5_nodu".
2012 Jan 10
1
Lapack routine dgesv: system is exactly singular
...code the data have failed.
> survdiff(Surv(f2$days.alive , f2$censored)~group, data=f2)
Error in drop(.Call("La_dgesv", a, as.matrix(b), tol, PACKAGE = "base")) :
Lapack routine dgesv: system is exactly singular
> head(f2)
group days.alive censored
1 PRI_CAS_5_NODU 1826 1
2 PRI_CAS_5_NODU 1488 0
3 PRI_CAS_5_NODU 1826 1
4 PRI_CAS_5_NODU 1826 1
5 PRI_CAS_5_NODU 303 0
6 PRI_CAS_5_NODU 1826 1
> str(f2)
'data.frame': 16795 obs. of 3 variables:
$ group : Factor...