how to draw a 45 degree line on qqnorm() plot?
Thank you. I didn't know scale(). Qqline passes through 1st and 3rd quantiles, It doesn't seem very useful to me. I thought a diagnol line will demonstrate the deviation from a standard normal. Correct me if I was wrong. Thanks.
On Apr 3, 2005 2:40 AM, Bill.Venables at csiro.au <Bill.Venables at csiro.au> wrote:
You didn't try very hard. Try this, look at it and think about it: jj <- scale(sample(1:100, 10)) qqnorm(jj) abline(0, 1) Rather than abline, however, most people, however, would use qqline(jj) in which case you don't need the scaling. V. -----Original Message----- From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Terry Mu Sent: Sunday, 3 April 2005 4:00 PM To: R-Help Subject: [R] how to draw a 45 degree line on qqnorm() plot? # I can not draw a 45 degree line on a qqnorm() plot, jj <- sample(c(1:100), 10) qqnorm(jj) abline() don't work. Thank you.
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