Create matrix with periodic increments

20 vues (au cours des 30 derniers jours)
T D
T D le 14 Avr 2016
Modifié(e) : T D le 14 Avr 2016
I want to create a matrix according to this logic:
Let's say I have a base vector like [1 2 3 4 5 6]'. First I want to replicate it 4 times each time increasing by 10. So after this step I will have
[1 2 3 4 5 6 11 12 13 14 15 16 21 22 23 24 25 26 31 32 33 34 35 36 41 42 43 44 45 46]'
and then I want to take this column and replicate it 20 times (my bad I meant 19 new copies), each time increasing by 1. So the next column would be
[2 3 4 5 6 7 12 13 14 15 16 17 22 23 24 25 26 27 32 33 34 35 36 37 42 43 44 45 46 47]'
and so on
I can't find a way to do this. I want the implementation to be vectorized, I don't want to use for loops.

Réponse acceptée

Stephen23
Stephen23 le 14 Avr 2016
Modifié(e) : Stephen23 le 14 Avr 2016
The function bsxfun is really handy for these kind of tasks:
>> X = [1;2;3;4;5;6];
>> Y = bsxfun(@plus,X,0:10:40);
>> Z = bsxfun(@plus,Y(:),0:20);
>> Z
Z =
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41
22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42
23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44
25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45
26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52
33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53
34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55
36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56
41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61
42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62
43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63
44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64
45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65
46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66
  1 commentaire
T D
T D le 14 Avr 2016
last part should be 0:19, I was a little inaccurate in the question I guess.

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