scMinTime

  scMinTime returns the minimum sample time in seconds

  Example
  time=scMinTime(fhandle)
  time=scMinTime(channels)
      where
      fhandle is a sigTOOL data view figure handle
      channels is an scchannel object or cell array of scchannel objects

      time is first sample time in seconds

  scMinTime is needed as sampling does not always begin at time zero.