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QRdata <- data.frame(x = c(1, 1, 5, 5), y = c(1, 2, 4, 6))
qr.model <- lm(y ~ x, data = QRdata)
Q <- qr.model %>% qr() %>% qr.Q(); Q
R <- qr.model %>% qr() %>% qr.R(); R
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