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tp25530949p25530949
2009 Sep 23
1
BLUP with missing data
hello guys, I need to do a BLUP in the simplest model
y = Xm + Zg + e
however I have missing data in the analysis which I can?t consider as
0(zero). So I need to generate the matrix X'Z, Z'X and Z'Z step by step; I
can?t use
crossprod(x) #neither
X'X <- t(x)%*%x
because I should skip the elements with missing data in the matrix
I?ll try to be more clear,
supposing
a matrix x