# sysdiag

block diagonal system connection

## Calling Sequence

    r=sysdiag(a1,a2,...,an)

## Description

Returns the block-diagonal system made with subsystems put in the main diagonal

ai

  subsystems (i.e. gains, or linear systems in state-space or transfer form)

Used in particular for system interconnections.

## Remark

At most 17 arguments.

## Examples

    s=poly(0,'s')
    sysdiag(rand(2,2),1/(s+1),[1/(s-1);1/((s-2)*(s-3))])
    sysdiag(tf2ss(1/s),1/(s+1),[1/(s-1);1/((s-2)*(s-3))])

## See Also

- brackets
- insertion
- feedback