On Jan 28, 2014, at 4:19 PM, Dennis Murphy wrote:
> Hi David:
>
>>> Do you meant [sic] the (cumulative) hazard function that is 1 minus the
>>> survival function?
>
> Um, 1 - S(t) = F(t), the cumulative *distribution function* of the
> random variable T. The cumulative hazard function is -ln S(t) and the
> hazard function is
> h(t) = d(-ln S(t))/dt = f(t)/S(t) [Klein and Moeschberger, p.27].
>
> I know you know this, but we all need a reminder occasionally...
Actually I had completely forgotten the distinction, so I hope you don't mind
my forwarding it to rhelp. I do appreciate being corrected when I make errors.
--
david
>
> Dennis
>
> On Tue, Jan 28, 2014 at 4:01 PM, David Winsemius <dwinsem...@comcast.net>
> wrote:
>>
>> On Jan 28, 2014, at 7:58 AM, Endy BlackEndy wrote:
>>
>>> Dear R users, how I can implement Breslow and Tarone-Ware tests for
>>> survival analysis?
>>
>> Tests ... of what?
>>
>> Perhaps you should learn to search:
>>
>> install.packages('sos')
>> library(sos)
>> findFn("Tarone-Ware")
>>
>> The 'comp' function in {survMisc} package promises several log-rank tests,
>> one of them named Tarone-Ware, another named Gehan-Breslow. It would
>> probably help to refer to the section of Klein J, Moeschberger M 2003
>> Survival Analysis, 2nd edition, that is cited on the help page. These test
>> are described in terms of Fleming-Harrington weights and Klein and
>> Moeschberger has several pages describing this family of tests.
>>
>>> Also, is there any way I can estimate and plot the hazard function,along
>>> the lines of the survival function in Survival Package?
>>
>> Do you meant the (cumulative) hazard function that is 1 minus the survival
>> function? (And you should not capitalize the name of the 'survival' package.)
>>
>>> (The package muhaz
>>> seems that does not do what it promises, except if I could not understand
>>> how it works.)
>>>
>> --
>>
>> David Winsemius
>> Alameda, CA, USA
>>
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David Winsemius
Alameda, CA, USA
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