Hi everybody, I want different scenarios of a vector with 0 and 1 elements. For example v=[0 0 0 0 0 0 0], v=[0 1 0 1 0 1 0 ] , v=[0 1 1 1 1 1 1] and so on. But the first element of vector is fixed and has be zero .

Hi everybody, I want different scenarios of a vector with 0 and 1 elements. For example v=[0 0 0 0 0 0 0]. v=[0 1 0 1 0 1 0 ] ,v=[0 1 1 1 1 1 1] and so on. But the first element of vector is fixed and has be zero

Answer 1

[Guillaume]

"Thank you very much. But I need all 64 different scenarios."

You should have asked that to start with.

Your example uses 7 bits, that would be 128 different scenarios, if you vary all the bits. Regardless, to get the first 64 binary numbers

dec2bin(0:63, 7) - '0'

Answer 2

[arich82]

Use dec2bin with its second argument:

>> n = 6; 
>> a = dec2bin(0:2^n-1, n+1)

a =

0000000
0000001
0000010
0000011
0000100
0000101
0000110
0000111 ...
[remaining output elided]

Note that this returns a char array. If you need an array of doubles, you can "cheat" to convert it by subtracting the string '0':

a = dec2bin(0:2^n-1, n+1) - '0';

Alternatively, you can use bitget, wrapped inside a call to bsxfun:

a =  bsxfun(@bitget, [0:2^n-1].', n+1:-1:1);

Please accept this answer if it helps, or let me know in the comments if I missed something.

[M Shaka]

Thank you very much . it works. But i cant see the item for acceptance of this answer. that is strange. I saw it before but now I can not. Do you know how I can do it? Thanks.

[Guillaume]

You can only accept one answer. Once you've accepted an answer you can't change your mind (as far as I know).

You can still vote for arich82's answer (click on the grey triangle next to the answer) to give him reputation points.

[arich82]

Guillaume's answer is essentially the same, and he submitted 4 minutes earlier while I was still typing; he should get the accepted answer. I'll leave mine here in case someone wants to reference the bitget solution.

Answer 3

[Thorsten]

 x = [0 rand(1,6) > 0.5];

[M Shaka]

Thank you very much. But I need all 64 different scenarios.