Dear R, I am graphing the following normal density curve. Why does it look so different?
# the curves x <- seq(-2, 4, by=0.00001) curve(dnorm(x, 2, 10^(-100)), -4, 4) #right answer curve(dnorm(x, 2, 10^(-100)), -3, 4) #changed -4 to -3, I get wrong answer Why the second curve is flat? I just changed it from -4 to -3. There is no density in that region. Also, I am doing numerical integration. Why are they so different? > x <- seq(-2, 4, by=0.00001) > sum(x*dnorm(x, 2, 10^(-100)))*0.00001 [1] 7.978846e+94 > x <- seq(-1, 4, by=0.00001) #changed -2 to -1 > sum(x*dnorm(x, 2, 10^(-100)))*0.00001 [1] 0 What is going here? What a I doing wrong? Thanks so much! [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.