From tlumley at u.washington.edu  Fri Feb 20 10:32:15 2009
From: tlumley at u.washington.edu (Thomas Lumley)
Date: Fri, 20 Feb 2009 01:32:15 -0800 (PST)
Subject: [Rd] plot.lm: "Cook's distance" label can overplot point labels
In-Reply-To: <002501c99291$91e161f0$b5a425d0$@ca>
Message-ID: <Pine.LNX.4.43.0902200132150.19096@hymn12.u.washington.edu>

On Thu, 19 Feb 2009, John Fox wrote:

> Dear John and Brian,
>
> My point about colour-blindness was partly tongue-in-cheek, but I think that
> it's a bad choice to have the second and third colours in the default
> palette as red and green.
>

Looking at the standard palette with dichromat::dichromat() it seems that it depends on which flavour of red-green anomaly you have. For deuteranopia the red and green are quite close. For protanopia they are pretty distinct and the confusion is between colours 3 and 7 (yellow vs green) and between 4 and 6 (blue and magenta).

I agree that the standard palette isn't ideal, though.

      -thomas

Thomas Lumley			Assoc. Professor, Biostatistics
tlumley at u.washington.edu	University of Washington, Seattle



[Rd] plot.lm: "Cook's distance" label can overplot point labels
Thomas Lumley