On 2011-04-17 16:29, jim holtman wrote:
Will one of these do it for you:
str(x)
'data.frame': 550 obs. of 5 variables:
$ year : Factor w/ 2 levels "one","two": 1 1 1 1 1 1 1 1 1 1 ...
$ size : Factor w/ 2 levels "large","small": 2 2 2 2 2 2 2 2 2 2 ...
$ distance: num 30.9 121.5 46.1 46.1 46.1 ...
$ taken : int 10 2 12 1 4 1 10 3 5 5 ...
$ mass : num 13.88 2.78 16.65 1.39 5.55 ...
require(lattice)
histogram(~taken|year, x)
histogram(~taken|year*size, x)
Jeff,
I would use lattice (or ggplot2) as well. But you
may want to look at the histbackback() function in
pkg Hmisc.
Peter Ehlers
[...snip...]
On Sun, Apr 17, 2011 at 10:51 AM, Stratford, Jeffrey
<jeffrey.stratf...@wilkes.edu> wrote:
Hi everyone,
I'm looking to produce a side-by-side histogram of the number of trips
taken by jays with a particular number of acorns after accounting for
year (year "one" and year "two"). I know this involves indexing first
then creating a histogram but I'm not sure how I'd do this. I want to
explore the possibilities that jays are altering their strategies in
different years. Data are below.
This is a common need for myself so any help would be greatly
appreciated!
Thanks,
Jeff
[...snip...]
--
Jim Holtman
Data Munger Guru
What is the problem that you are trying to solve?
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