COMBINATOR -combinations AND permutations

バージョン 1.3.0.0 (32.7 KB) 作成者: Matt Fig
Returns 1 of 4 different samplings on the set 1:N, taken K at a time.
ダウンロード: 11.3K
更新 2010/9/9

ライセンスの表示

COMBINATOR will return one of 4 different samplings on the set 1:N, taken K at a time. These samplings are given as follows:

PERMUTATIONS WITH REPETITION/REPLACEMENT
COMBINATOR(N,K,'p','r') -- N >= 1, K >= 0

PERMUTATIONS WITHOUT REPETITION/REPLACEMENT
COMBINATOR(N,K,'p') -- N >= 1, N >= K >= 0

COMBINATIONS WITH REPETITION/REPLACEMENT
COMBINATOR(N,K,'c','r') -- N >= 1, K >= 0

COMBINATIONS WITHOUT REPETITION/REPLACEMENT
COMBINATOR(N,K,'c') -- N >= 1, N >= K >= 0

Example:

combinator(4,2,'p','r') % Permutations with repetition
combinator(4,2,'p') % Permutations without repetition
combinator(4,2,'c','r') % Combinations with repetition
combinator(4,2,'c') % Combinations without repetition
ans =
1 1
1 2
1 3
1 4
2 1
2 2
2 3
2 4
3 1
3 2
3 3
3 4
4 1
4 2
4 3
4 4
ans =
1 2
1 3
1 4
2 1
2 3
2 4
3 1
3 2
3 4
4 1
4 2
4 3
ans =
1 1
1 2
1 3
1 4
2 2
2 3
2 4
3 3
3 4
4 4
ans =
1 2
1 3
1 4
2 3
2 4
3 4

The accompanying c++ file can be MEXed to provide the ability to specify N as an int8, int16, or int32. This saves memory and is faster. I have provided a MEX file that was created on Win XP with 2006a that may work. If not, the file will need to be MEXed on your machine.
Please READ the help before using.
I would very much appreciate bug reports sent through email, as well as suggestions for improvement. Thanks.

引用

Matt Fig (2024). COMBINATOR -combinations AND permutations (https://www.mathworks.com/matlabcentral/fileexchange/24325-combinator-combinations-and-permutations), MATLAB Central File Exchange. 取得済み .

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バージョン 公開済み リリース ノート
1.3.0.0

Previous update had left out the C++ source code.

1.2.0.0

Implemented changes suggested by Jan Simon.

1.1.0.0

Added ability to specify integer class for N. MEX-File.

1.0.0.0