Hi,I use the 'lmekin' model of the 'kinship' package of R in order to estimate
heritability. I want to estimate the confidence interval of the variance
coefficient and so I should use a bootstrap simulation. The pedigree file has
1386 subjects so I create a kinship matrix [1386*1386].This is the code of R I
use:
kfit2 <- lmekin(IT~1+AGE +(1|ID), dati1, varlist=list(kmat))kfit2kfit2$vcoef
library(boot)
var <- function(formula,data,indices,varlist) { d <- data[indices,] # allows
boot to select sample kfit2 <- lmekin(formula, data=d, varlist=list(kmat))
return(kfit2$vcoef)}
# bootstrapping with 1000 replications results <- boot(data=dati1,
statistic=var, R=1000, formula=IT~1+AGE +(1|ID),varlist=list(kmat))
## WARNING MESSAGE: wrong number of indices for a matrix
What can I do with the kinship matrix??
Thanks for help!!
Best regards
Roberta
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