ssprint pretty print for linear system

## Syntax

                ssprint(sl)
                ssprint(sl, out)

## Arguments

sl

  list (`syslin` list)

out

  output (default value `out=%io(2)`)

## Description

pretty print of a linear system in state-space form `sl=(A,B,C,D) syslin` list.

## Examples

    a = [1 1;0 1];
    b = [0 1;1 0];
    c = [1, 1];
    d = [3, 2];
    modelC = syslin('c', a, b, c, d)
    modelD = syslin('d', a, b, c, d)
    ssprint(modelC)
    ssprint(modelD)

## See also

- math_rendering_features_in_graphic
- prettyprint