On Feb 18, 2012, at 8:35 AM, Adel ESSAFI wrote:
with simpler expressions:
if I have a dataframe
A B C
is it possible de transform it to a matrix where nrow(A) colomns,
nrow(B)
row and for each value of C, we put the corresponding value in the
matrix.
Perhaps:
xtabs(C ~ A + B, data=dfrm)
There will be an implicit summation of C-values in the presence of
duplicates. For the application of other functions, you would use
tapply. This untested code might give you counts:
with(dfrm, tapply(C, list(A, B), length)
--
David.
Regards
Le 18 février 2012 13:57, Adel ESSAFI <adeless...@gmail.com> a écrit :
Hello
I had not planned on answering this question, because the data was too
ambiguous. You should learn to use dput when posting data with your
questions.
orderulcount
Group.1 Group.2 Group.3 x V5
7 C L 0.0 30 C / L
19 C L 0.2 27 C / L
31 C L 0.4 15 C / L
43 C L 0.6 7 C / L
54 C L 0.8 2 C / L
10 C S 0.0 27 C / S
22 C S 0.2 10 C / S
34 C S 0.4 6 C / S
46 C S 0.6 1 C / S
1 D D 0.0 30 D / D
13 D D 0.2 30 D / D
25 D D 0.4 17 D / D
37 D D 0.6 9 D / D
49 D D 0.8 2 D / D
3 D F 0.0 30 D / F
15 D F 0.2 26 D / F
27 D F 0.4 13 D / F
39 D F 0.6 3 D / F
51 D F 0.8 3 D / F
5 D I 0.0 26 D / I
17 D I 0.2 7 D / I
29 D I 0.4 7 D / I
41 D I 0.6 1 D / I
53 D I 0.8 1 D / I
8 D L 0.0 30 D / L
20 D L 0.2 26 D / L
32 D L 0.4 14 D / L
44 D L 0.6 8 D / L
55 D L 0.8 2 D / L
11 D S 0.0 27 D / S
23 D S 0.2 8 D / S
35 D S 0.4 4 D / S
47 D S 0.6 1 D / S
2 I D 0.0 30 I / D
14 I D 0.2 30 I / D
26 I D 0.4 14 I / D
38 I D 0.6 9 I / D
50 I D 0.8 2 I / D
4 I F 0.0 30 I / F
16 I F 0.2 29 I / F
28 I F 0.4 16 I / F
40 I F 0.6 5 I / F
52 I F 0.8 2 I / F
6 I I 0.0 30 I / I
18 I I 0.2 17 I / I
30 I I 0.4 4 I / I
42 I I 0.6 1 I / I
9 I L 0.0 30 I / L
21 I L 0.2 27 I / L
33 I L 0.4 17 I / L
45 I L 0.6 8 I / L
56 I L 0.8 2 I / L
12 I S 0.0 28 I / S
24 I S 0.2 11 I / S
36 I S 0.4 6 I / S
48 I S 0.6 3 I / S
I have a data frame formed by 5 colomns. How to transform this data
frame
to a matrix formed as follow:
1. the colomn 5 is the comumn (string)
2. the colomn 5 row
3. the data are the colomn x.
I aim to draw barplot later using the matrix.
Thanks for any help
--
PhD candidate in Computer Science
Address
3 avenue lamine, cité ezzahra, Sousse 4000
Tunisia
tel: +216 97 246 706 (+33640302046 jusqu'au 15/6)
fax: +216 71 391 166
--
PhD candidate in Computer Science
Address
3 avenue lamine, cité ezzahra, Sousse 4000
Tunisia
tel: +216 97 246 706 (+33640302046 jusqu'au 15/6)
fax: +216 71 391 166
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