Hi,
>
> Thank you for your help.
>
I try your function 'combvec2' .but , it gives me an error :Erreur dans
rep(1, c2) : argument 'times' incorrect
> this function 'combvec ' takes any number of inputs on Matlab. So, you can
> take more than two matrix.
>
>
> The help of this function 'combvec' is like this on Matlab:
>
> >> help combvec
>
> COMBVEC Create all combinations of vectors.
>
> Syntax
>
> combvec(a1,a2,...)
>
> Description
>
> COMBVEC(A1,A2,...) takes any number of inputs,
> A1 - Matrix of N1 (column) vectors.
> A2 - Matrix of N2 (column) vectors.
> and returns a matrix of (N1*N2*...) column vectors, where the columns
> consist of all possibilities of A2 vectors, appended to
> A1 vectors, etc.
>
> Example
>
> a1 = [1 2 3; 4 5 6];
> a2 = [7 8; 9 10];
> a3 = combvec(a1,a2)
>
> 2010/4/19 Dennis Murphy <djmu...@gmail.com>
>
> Hi:
>>
>> This is a simplistic version of combvec that works for two input matrices;
>> I don't
>> have Matlab, and I don't understand how the function generalizes to more
>> than
>> two input matrices, so this is the best I can offer, for what it's
>> worth...
>>
>> combvec2 <- function(m1, m2) {
>> c1 <- ncol(m1)
>> c2 <- ncol(m2)
>> k1 <- kronecker(matrix(rep(1, c2), nrow = 1), m1)
>> k2 <- kronecker(m2, matrix(rep(1, c1), nrow = 1))
>> rbind(k1, k2)
>> }
>>
>> > a1 <- matrix(1:6, nrow = 2, byrow = TRUE)
>> > a1
>> [,1] [,2] [,3]
>> [1,] 1 2 3
>> [2,] 4 5 6
>> > a2 <- matrix(7:10, nrow = 2, byrow = TRUE)
>>
>> > combvec2(a1, a2)
>> [,1] [,2] [,3] [,4] [,5] [,6]
>> [1,] 1 2 3 1 2 3
>> [2,] 4 5 6 4 5 6
>> [3,] 7 7 7 8 8 8
>> [4,] 9 9 9 10 10 10
>>
>> HTH,
>> Dennis
>>
>> On Sun, Apr 18, 2010 at 3:00 AM, anderson nuel <anderson....@gmail.com>wrote:
>>
>>> Hello,
>>>
>>> I would like to create all combinations of vectors. I find on Matalb
>>> this
>>> function 'combvec' which create all combinations of vectors.
>>>
>>> Please could you help me to find the corresponds function of 'combvec'.
>>>
>>> For example:
>>>
>>> On Matlab
>>>
>>> >> a1 = [1 2 3; 4 5 6]
>>>
>>> a1 =
>>>
>>> 1 2 3
>>> 4 5 6
>>>
>>> >> a2 = [7 8; 9 10]
>>>
>>> a2 =
>>>
>>> 7 8
>>> 9 10
>>>
>>> >> a3 = combvec(a1,a2)
>>>
>>> a3 =
>>>
>>> 1 2 3 1 2 3
>>> 4 5 6 4 5 6
>>> 7 7 7 8 8 8
>>> 9 9 9 10 10 10
>>>
>>> Best Regards
>>>
>>> [[alternative HTML version deleted]]
>>>
>>> ______________________________________________
>>> R-help@r-project.org mailing list
>>> https://stat.ethz.ch/mailman/listinfo/r-help
>>> PLEASE do read the posting guide
>>> http://www.R-project.org/posting-guide.html
>>> and provide commented, minimal, self-contained, reproducible code.
>>>
>>
>>
>
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
