switch(i_type){
case mxUINT8_CLASS:
  uchr_dt = (unsigned char*)mxGetData(var);
  break;
case mxINT32_CLASS:
  int_dt = (int*)mxGetData(var);
  break;
case mxUINT32_CLASS:
  uint_dt = (unsigned int*)mxGetData(var);
  break;
case mxSINGLE_CLASS:
  flt_dt = (float*)mxGetData(var);
  break;
case mxDOUBLE_CLASS:
  dbl_dt = (double*)mxGetData(var);
  break;
default:
  Fatal_Error("Input type not supported.n");
}