About matrix: how to make matrix binary (0 and 1)

I need write the matrix (0 0 0 0 0), (1 0 0 0 0), (1 1 0 0 0), (1 1 1 0 0),..., (1 1 1 1 1) with 32 possibilities of zero and one using the matlab, and don´t hand.

Thanks.

Answer 1

[Matt Fig]

S = dec2bin((1:32).')  % If a string is o.k.
N = S - '0'  % If you need a numeric matrix.

[John Petersen]

How does the N=S-'0' work? I see that it does, very clever, but why?

[JRC]

Thanks Matt Fig...

And it´s possible to do the matrix (-1 -1 -1 -1 -1), (-1 -1 -1 -1 1), (-1 -1 -1 1 1), (-1 -1 1 1 1),..., (1 1 1 1 1) with 32 possibilities of one and one minus using the matlab, and don´t hand.

[José-Luis]

@JRC: Add:

 N(N==0) = -1;

Please accept an answer if it helps you.

[Azzi Abdelmalek]

%or

N(~N)=-1;

[JRC]

Ok...

Thanks.

[Matt Fig]

John, MATLAB converts both strings to doubles then subtracts. It is the same as doing:

S - 48

[Image Analyst]

You can also cast to logical if you want a boolean type of variable:

logicalVariable = logical(doubleVariable);

Logical variables are useful in indexing, especially in image processing. In image processing a "binary" variable is usually assumed to be of logical type ("class").