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[R] Lattice: reversing order of panel placement in conditional
 histograms

Sam Ferguson

2005-07-23

Replies:

Hi R-people,

I have a question about lattice in general, and histogram specfically. How do you control the ordering of factors that controls the placement of the conditional panels. I have a dataset with factors that go 'Q1','Q2',"Q3','Q5' and of course I want the plot to place Question Q1 at the top and Question Q5 at the bottom of the graphical output. histogram() does the opposite as 5 is larger than 1. Similarly my 'AlertFormat' factor is a textual category, and I need the data to read from left to right (representing old to new) , with 'New A & V' on the right, and 'Pre-existing A & V' on the left, which is the opposite to how histogram plots.

The current lattice output from what's below is here:- http://www.arch.usyd.edu.au/~sfer9710/latticeoutput.pdf

All I really want to do is reverse the placement entirely from what I have received above.

I've checked the help to no avail, and have looked through the r-help archive. I love lattice, but always have problems of this nature. I hope someone can help me solve them.

Thanks heaps
-- Sam


> version
      _
platform powerpc-apple-darwin7.9.0
arch   powerpc
os     darwin7.9.0
system  powerpc, darwin7.9.0
status  Patched
major   2
minor   1.0
year   2005
month   05
day    12
language R

> aaRatings
  Question     X.Alert.Format. Response
1     Q1         New A & V     3
2     Q1         New A & V     3
3     Q1         New A & V     3
4     Q1         New A & V     3
5     Q1 New A, Pre-existing V     3
6     Q1 New A, Pre-existing V     3
7     Q1 New A, Pre-existing V     2
8     Q1 New A, Pre-existing V     2
9     Q1 New V, Pre-existing A     3
10     Q1 New V, Pre-existing A     2
11     Q1 New V, Pre-existing A     2
12     Q1 New V, Pre-existing A     2
13     Q1   Pre-existing A & V     1
14     Q1   Pre-existing A & V     -2
15     Q1   Pre-existing A & V     -2
16     Q1   Pre-existing A & V     -2
17     Q2         New A & V     3
18     Q2         New A & V     3
19     Q2         New A & V     3
20     Q2         New A & V     3
21     Q2 New A, Pre-existing V     3
22     Q2 New A, Pre-existing V     2
23     Q2 New A, Pre-existing V     2
24     Q2 New A, Pre-existing V     1
25     Q2 New V, Pre-existing A     3
26     Q2 New V, Pre-existing A     2
27     Q2 New V, Pre-existing A     2
28     Q2 New V, Pre-existing A     2
29     Q2   Pre-existing A & V     1
30     Q2   Pre-existing A & V     -2
31     Q2   Pre-existing A & V     -2
32     Q2   Pre-existing A & V     -2
33     Q3         New A & V     3
34     Q3         New A & V     3
35     Q3         New A & V     3
36     Q3         New A & V     3
37     Q3 New A, Pre-existing V     3
38     Q3 New A, Pre-existing V     3
39     Q3 New A, Pre-existing V     3
40     Q3 New A, Pre-existing V     2
41     Q3 New V, Pre-existing A     3
42     Q3 New V, Pre-existing A     3
43     Q3 New V, Pre-existing A     3
44     Q3 New V, Pre-existing A     2
45     Q3   Pre-existing A & V     2
46     Q3   Pre-existing A & V     1
47     Q3   Pre-existing A & V     -2
48     Q3   Pre-existing A & V     -3
49     Q5         New A & V     3
50     Q5         New A & V     3
51     Q5         New A & V     3
52     Q5         New A & V     3
53     Q5 New A, Pre-existing V     3
54     Q5 New A, Pre-existing V     3
55     Q5 New A, Pre-existing V     1
56     Q5 New A, Pre-existing V     1
57     Q5 New V, Pre-existing A     3
58     Q5 New V, Pre-existing A     2
59     Q5 New V, Pre-existing A     2
60     Q5 New V, Pre-existing A     2
61     Q5   Pre-existing A & V     1
62     Q5   Pre-existing A & V     -1
63     Q5   Pre-existing A & V     -1
64     Q5   Pre-existing A & V     -3
> attach(aaRatings)
> histogram(Response|X.Alert.Format.+Question,type="count",nint=8)

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