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I have the following data set > data A B X1 X2 Y 1 A1 B1 1.1 2.9 1.2 2 A1 B2 1.0 3.2 2.3 3 A2 B1 1.0 3.3 1.6 4...
thank you all. i have deliberately chosen matinv (although obviously an outdated version) because it uses the sweep operator. i know of other methods to calculate generalized inverses. however, it is also true that the sweep operator is capable of...
Hello, the following lines m <- matrix(c(1,1,9,1,2,6,1,3,7,2,1,4,2,2,5,2,3,1,3,1,2,3,2,-1,3,3,-2), 9, 3, byrow = TRUE, dimnames=list...
i am trying to use matinv from the Design package to compute the generalized inverse of the normal equations of a 3x3 design via the sweep operator. That is, for the linear model y = ? + x1 + x2 + x1*x2 where x1...
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