blkdiag

Block-diagonal matrix from input matrices.

Syntax

out = blkdiag(a, b, c, ...)

Description

Returns a block-diagonal matrix whose diagonal blocks are the input matrices, in order, with zero blocks elsewhere. Inputs may have different sizes (and even differing element types — promoted to a common type in the output).

Examples

blkdiag([1 2; 3 4], 5, [6 7])
% 4×4: [1 2 0 0; 3 4 0 0; 0 0 5 0; 0 0 0 6]   (last row is [0 0 0 7])

See also

• diag — Extract a diagonal, or build a matrix from a diagonal.
• cat — Concatenate arrays along a specified dimension.
• horzcat — Horizontal concatenation ([A, B]).
• vertcat — Vertical concatenation ([A; B]).