R help - Jul 2005 - Mean and variance of the right-censored data

Hi,

I need to get mean and variance of right censored data. How can I do that?

I have a vector of values (called a) and vector of booleans (whether value 
is censored) (called b). What to do with this? Sorry, I'm R beginner.

Thank you!

Pete

No, it doesn't.

Right-censored data are data with (so-called) censored values. E.g. there 
is a newsvendor and he sells newspapers for a week.

Mon: 77
Tue: 56
Wed: 60
Thu: 80
Fri: 85
Sat: 59
Sun: 48

This values are numbers of sold pieces from Monday to Sunday. And he sold 
out newspapers on Wednesday and on Thursday. This is an example of 
right-censored data. He could sold more pieces in that two days.

And I need the variance and mean of data like this.

Thank you!

On Sun, 24 Jul 2005, jim holtman wrote:
> does
>
> mean(a[b])
> var(a[b])
>
> do what you want?  This selects just those values of 'a' that are
TRUE in 'b'.
>
> On 7/24/05, Petr Mandys <petr.mandys at matfyz.cz> wrote:
>> Hi,
>>
>> I need to get mean and variance of right censored data. How can I do
that?
>>
>> I have a vector of values (called a) and vector of booleans (whether
value
>> is censored) (called b). What to do with this? Sorry, I'm R
beginner.
>>
>> Thank you!
>>
>> Pete
>>
>> ______________________________________________
>> R-help at stat.math.ethz.ch mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html
>>
>
>
> -- 
> Jim Holtman
>
> What the problem you are trying to solve?
>

The survival package has functions for fitting models to right censored data.

require(survival)
?survfit
?Surv

-Don

At 12:17 AM +0200 7/25/05, Petr Mandys wrote:
>Hi,
>
>I need to get mean and variance of right censored data. How can I do that?
>
>I have a vector of values (called a) and vector of booleans (whether value
>is censored) (called b). What to do with this? Sorry, I'm R beginner.
>
>Thank you!
>
>Pete
>
>______________________________________________
>R-help at stat.math.ethz.ch mailing list
>https://stat.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html

-- 
--------------------------------------
Don MacQueen
Environmental Protection Department
Lawrence Livermore National Laboratory
Livermore, CA, USA