On 19-Jan-09, at 4:59 PM, Rolf Turner wrote:
On 20/01/2009, at 1:46 PM, Duncan Murdoch wrote:
On 19/01/2009 7:36 PM, stephen sefick wrote:
what is your suggestion for distinguishing between many bars without
color? I have grown up in the time of standarized tests - good
or bad
I never felt nauseous.
Use gray levels or labels. If "many" is bigger than 5, it's not
going
to be easy, whatever method you are using.
I disagree. Grey levels suck; labels are a kludge. It is an issue
for ``many'' == 2, for which crosshatching works perfectly.
cheers,
Rolf
I believe Tufte had negative things to say about barplots, hatched or
not. He said something to the effect
of "Why use a two-dimensional rectangle to represent a one-
dimensional data point?"
What about a dotplot with a different symbol for each of what would
have been hatched rectangles?
That reduces the ink/information ratio (which I believe was also a
concern of Tufte's).
Don
Duncan Murdoch
Stephen
On Mon, Jan 19, 2009 at 5:20 PM, Greg Snow <greg.s...@imail.org>
wrote:
I think the fact that the grid package does not support cross-
hatching is a feature not a bug (or deficiency), and I hope that
this is not "fixed". Tufte's book (The Visual Display of
Quantitative Information) has a section on why cross-hatching
should be avoided (unless of course your goal is to induce
nausea in the observer rather than convey information).
I would edit Hadley's statement below to say "fortunately
there's no way to do this in ggplot2".
--
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.s...@imail.org
801.408.8111
-----Original Message-----
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-
project.org] On Behalf Of hadley wickham
Sent: Thursday, January 15, 2009 10:55 AM
To: stephen sefick
Cc: R-help
Subject: Re: [R] Bar Plot ggplot2 Filling bars with cross hatching
Hi Stephen,
#I am putting a test together for an introductory biology
class and I
would like to put different cross hatching inside of each bar
for the
bar plot below
ggplot2 uses the grid package to do all the drawing, and currently
grid doesn't support cross-hatching, so unfortunately there's
no way
to do this in ggplot2.
Regards,
Hadley
--
http://had.co.nz/
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