[R] Y-axis scale in Q-Qplot

[Marc Schwartz]

On Thu, 2007-09-27 at 18:19 +0100, S Bina wrote:
> Dear All, 
> 
> I have made a Q-Qplot (qqnorm) and want to change the scale of the y-axis from
> -4 to 25.
> 
> How can I do that?
> 
> Many thanks
> Samira

You can, but the real question is: should you?

  qqnorm(x, ylim = c(-4, 25))

will give you what you want, but it will distort the graph aspect ratio
such that your 45 degree line (ie. qqline(x) ) is no longer at 45
degrees, which affects visualization.

R graphics generally have "sensible" defaults for sensible reasons.

For more information, do a Google search using the phrase:

  "banking to 45 degrees"

HTH,

Marc Schwartz