Mat

BMat – matrix data type

Calling sequence

A=[a11, a12, ..., a1n;
   a21, a22, ..., a2n;
   ...
   am1, am2, ...; amn]

Parameters

a11 ...: boolean numbers

Description
The Bmat data type is a matrix made of boolean numbers. A boolean number is either T (true) or F (false). T is the nsp variable \%t (same as 1==1) and F is the nsp variable \%t (same as 1~=1). In conditional expressions T is equivalent to any nonzero number and F is equivalent to zero.

Operations on boolean matrices

Methods from the matint interface

A.redim[m,n] reshape matrix to size mxn. m or n can be set to -1
A.concatr[B] A = [A,B]
A.concatd[B] A = [A;B]
A.perm_elem[p,q[,dim]] permute p and q: elements (default or dim=0), rows (dim=1) or columns (dim=2).

Extraction, insertion, deletion

If I and is J are respectively row and column indices A(I,J) is the submatrix of A with entries in I and j.
A(I,:) is the submatrix of A with row indices in I.
A(:,J) is the submatrix of A with comumn indices in I.
A(:,:) is A
A(:) is the column matrix obtained by stacking the columns of A.

If I and is J are row and column indices A(I,J)=B inserts matrix B into matrix A in rows I and columns J.
A(I,:)=[] removes the rows of A with indices in J.
A(:,J)=[] removes the columns of A with indices in J.

Compatibility with numerical matrices

Boolean matrices are converted into numerical matices with T converted to 1 and F converted to 0.

Example of boolean function

bmat_create : make a boolean matrix.
b2m : explicit conversion from boolean matrix to numeric matrix.
m2b : explicit conversion from numeric matrix to boolean matrix.