Find all combinations 6 numbers using only 0,1 and 2

Question

Is there a simple way of finding all the combinations of 6 digits using only 0, 1 and 2?

So it starts like 000000 and finishes 222222

I have looked online but all i can find is the formula for finding how many there are but i need a list of all of them

If there is a code in R that will be even better

It is not completely neccessary but if there is a way to create a list where the 1st and 4th digit sum to a maximum of 2, 2nd and 5th digit sum to a maximum of 2 and 3rd and 6th digit sum to a maximum of 2

Thankyou

http://stackoverflow.com/questions/342052/how-to-increment-a-java-string-through-all-the-possibilities — Beatty, Oct 21 '14 at 12:24
thankyou, but i can't use java...i have adjusted my question to something i am able to use :) — Summer Gleek, Oct 21 '14 at 12:27

flodel · Accepted Answer · 2014-10-21T12:37:36.520

4

You can do:

do.call(paste0, expand.grid(rep(list(0:2), 6)))

Adding a rev in there gives a different order that might feel more natural:

do.call(paste0, rev(expand.grid(rep(list(0:2), 6))))

I will only give you a hint for your new (added) question as I am now worried I might be doing your homework. expand.grid returns a data.frame. With a little work on it, you can probably extract the subset of rows that only matter to you.

edited Oct 21 '14 at 12:37

answered Oct 21 '14 at 12:31

flodel

87,577
21
185
223

1

haha its not homework, its part of my job and im not that great with r yet. but thankyou anyway :) – Summer Gleek Oct 21 '14 at 12:39

Find all combinations 6 numbers using only 0,1 and 2

1 Answers1