[R] Variance of Y_hat in a linear model

From: Li Zhang <zhanglitt_at_yahoo.com>
Date: Tue 17 Oct 2006 - 16:21:02 GMT

   

    Y X Z

   42.0    7.0   33.0
   33.0    4.0   41.0
   75.0   16.0    7.0
   28.0    3.0   49.0
   91.0   21.0    5.0
   55.0    8.0   31.0


data<-read.table("d.txt",header=TRUE)
mod<-lm(data$Y~data$X+data$Z)
predict(mod)

       1 2 3 4 5 6 44.69961 34.22997 76.63735 29.32986 91.09000 48.01321

In the lm, the predicted(fitted) Y_1_hat is 44.6991,

is there a function to give me the variance of y_1_hat?

Neither "anova" nor "summary" gives this value.

Thank You



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