 Usage:  multiplot(data,t0,dt,labels)  
 
 Input:

  data                   (TxK)-matrix of K-dimensional time series 
                         
  t0                     scalar, starting point of time series. e.g. 1960.4 
                         for fourth quarter of 1960 
                         
  dt                     scalar, frequency: 1=annual, 4=quarterly, 12=monthly etc. 
                         
  labels                 (Kx1)-vector of strings containing the labels for each 
                         time series 
                         
--------------------------------------------------------------
(C) MD*TECH Method and Data Technologies, 17.8.2000
