Justin — Sep 10, 2013, 1:14 PM
a <- 2
b <- 7
sigSq <- 0.5
n <- 400
set.seed(1234)
x <- runif(n)
y <- a + b * x + rnorm(n, sd = sqrt(sigSq))
(avgX <- mean(x))
[1] 0.4969
plot(x, y)
abline(a, b, col = "blue", lwd = 2)
sessionInfo()
R version 3.0.1 (2013-05-16)
Platform: i386-w64-mingw32/i386 (32-bit)
locale:
[1] LC_COLLATE=English_United States.1252
[2] LC_CTYPE=English_United States.1252
[3] LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C
[5] LC_TIME=English_United States.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] knitr_1.4.1
loaded via a namespace (and not attached):
[1] digest_0.6.3 evaluate_0.4.7 formatR_0.9 stringr_0.6.2
[5] tools_3.0.1