inst/snippet/concrete-QR02.R
In rpruim/fastR: Foundations and Applications of Statistics Using R (2nd Edition)
x1 <- Concretemod$limestone; x2 <- Concretemod$water
X <- cbind(1, x1, x2)
Q <- cbind(
1 / sqrt(nrow(Concretemod)),
v1 / vlength(v1),
w2 / vlength(w2))
t(Q) %*% Q %>% round(4) # should be the identity matrix
rpruim/fastR documentation built on Nov. 12, 2023, 12:26 p.m.
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x1 <- Concretemod$limestone; x2 <- Concretemod$water
X <- cbind(1, x1, x2)
Q <- cbind(
1 / sqrt(nrow(Concretemod)),
v1 / vlength(v1),
w2 / vlength(w2))
t(Q) %*% Q %>% round(4) # should be the identity matrix
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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