calculating combinations of two vectors simultanously?

I am a beginner so would you please explain the easiest, the most straightforward methods to calculate combinations of more than one vector simultanously?

a=[1, 3, 5, 7, 9] and b=[2, 4, 6, 8, 10] I would like to calculate the (a,3) and (b,3) simultanously and the results should be combined. How can I do it instead of doing nchoosek(a,3) and nchoosek(b,3) I would like to do it in less steps, if possible one step.

Thank you.

[Jan]

It is not clear to me, what this means: "calculate the (a,3) and (b,3) simultanously and the results should be combined".

What is the wanted output?

Answer 1

[Jan]

a = [1, 3, 5, 7, 9];
b = [2, 4, 6, 8, 10];

index = nchoosek(1:numel(a), 3);
a(index)

ans = 10×3

1 3 5 1 3 7 1 3 9 1 5 7 1 5 9 1 7 9 3 5 7 3 5 9 3 7 9 5 7 9

b(index)

ans = 10×3

2 4 6 2 4 8 2 4 10 2 6 8 2 6 10 2 8 10 4 6 8 4 6 10 4 8 10 6 8 10

Answer 2

[metin yilmaz]

Sorry, for being late. You did the operation for a and for b. Can you do one operation that will calculate both a(index) and b(index) and give them as the result. That is the result will be:

1 3 5

1 3 7

1 3 9

1 5 7

1 5 9

1 7 9

3 5 7

3 5 9

3 7 9

5 7 9

2 4 6

2 4 8

2 4 10

2 6 8

2 6 10

2 8 10

4 6 8

4 6 10

4 8 10

6 8 10