# sysconv

system conversion

## Calling Sequence

    [s1,s2]=sysconv(s1,s2)

## Arguments

s1,s2

  list (linear `syslin` systems)

## Description

Converts `s1` and `s2` into common representation in order that system interconnexion operations can be applied. Utility function for experts. The conversion rules in given in the following table.

"c"

  continuous time system

"d"

  discrete time system

n

  sampled system with sampling period n

[]

  system with undefined time domain For mixed systems `s1` and `s2` are put in state-space representation.

     s1\s2 |    "c"     |     "d"     |      n2        |     []     |
     ---------------------------------------------------------------
     "c"   | nothing    |uncompatible | c2e(s1,n2)     |  c(s2)     |
     ---------------------------------------------------------------
     "d"   |uncompatible| nothing     | e(s1,n2)       |  d(s2)     |
     ---------------------------------------------------------------
     n1    | c2e(s2,n1) | e(s2,n1)    | n1<>n2 uncomp  |  e(s2,n1)  |
           |            |             | n1=n2  nothing |            |
     ---------------------------------------------------------------
     []    | c(s1)      | d(s1)       | e(s1,n2)       |  nothing   |
     ---------------------------------------------------------------

With the following meaning:

n1,n2

  sampling period

c2e(s,n)

  the continuous-time system s is transformed into a sampled system with sampling period n.

c(s)

  conversion to continuous (time domain is `"c"`)

d(s)

  conversion to discrete (time domain is `"d"`)

e(s,n)

  conversion to samples system with period `n`

## Examples

    s1=ssrand(1,1,2);
    s2=ss2tf(s1);
    [s1,s2]=sysconv(s1,s2);

## See Also

- syslin
- ss2tf
- tf2ss