Constuctiing special array (like binary)

Hi, I'am new to matlab and I want to make an nxn matrix containing as first row zeros and as last row ones. The other rows should be like binary digits.

Example with n=4:

0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111

Thank you!!

[Matt J]

The matrix you've shown is not nxn. It is 2^n x n.

[Dimitris Sideratos]

You are right! Thank you!

Answer 1

[Matt J]

 dec2bin(0:2^n-1)-'0'

[Dimitris Sideratos]

thank you!!

[Matt J]

More generally

 m=5; n=3; 
 [c{1:n}]=ndgrid(1:m);

 result=reshape( cat(n+1,c{end:-1:1}),m^n,n )

[Dimitris Sideratos]

Thank you!

Answer 2

[Andrei Bobrov]

rem(floor((0:pow2(n)-1)'*pow2(1-n:0)),2)

[Dimitris Sideratos]

thank you!!

Answer 3

[Dimitris Sideratos]

Can I extend this script to run with more than 2 values (0 or 1)?? I want m^n x n an the values should be 0,1.. m-1??

Thank you in advance!

[Jan]

Please open a new thread for a new question.

[Dimitris Sideratos]

Ok. You are right.

Answer 4

[Jos (10584)]

Take a look at COMBN:

http://www.mathworks.com/matlabcentral/fileexchange/7147-combn-4-3

USe like this:

N = 2 ; M = 3 ;
combn(0:M-1,N)

[Dimitris Sideratos]

thank you, this function is very helpfull