Hi all,

I would like to run a paired t-test with censored data using the NADA 
package.  Here is an example data set:

data <- data.frame(group=rep(c('a','b'), each=6),
obs=c(2,2,5,7,10,10,5,5,6,8,5,9),
cen=c(T,T,F,F,F,F,F,F,F,F,F,F))


#A two sample t-test can be executed as follows:
library(NADA)
cendiff(data$obs, data$cen, data$group)


Does anybody know how to extend this to conduct a paired t-test based on 
the difference between paired observations of groups A and B?

Many thanks,
Jake


==================================
Jake J. Beaulieu, PhD
US Environmental Protection Agency
National Risk Management Research Lab
26 W. Martin Luther King Drive
Cincinnati, OH 45268
USA
513-569-7842  (desk)
513-487-2511 (fax)
beaulieu.jake@epa.gov
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