concrete-QR03.R
In fastR2: Foundations and Applications of Statistics Using R (2nd Edition)

R <- t(Q) %*% X; R %>% round(4)   # should be upper triangular
Q %*% R %>% round(4)              # should be X
X

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fastR2 documentation built on Nov. 9, 2023, 9:06 a.m.

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