Hello, I try to correlate two timeseries. I don not understand, why I get an error for incompatile size. both have the same frequencies. In [54]: x = series_01 In [55]: y = series_02 In [56]: diff = y.size-x.size In [57]: diff Out[57]: 0 In [58]: x.shape Out[58]: (15360,) In [59]: y.shape Out[59]: (15360,) In [60]: np.correlate(x, y) --------------------------------------------------------------------------- TimeSeriesCompatibilityError Traceback (most recent call last) D:\python\test.py in <module>() ----> 1 2 3 4 5 C:\Programme\pythonxy\python\lib\site-packages\numpy\core\numeric.pyc in correlate(a, v, mode) 513 """ 514 mode = _mode_from_name(mode) --> 515 return multiarray.correlate(a,v,mode) 516 517 C:\Programme\pythonxy\python\lib\site-packages\scikits\timeseries\tseries.pyc in __array_finalize__(self, obj) 459 def __array_finalize__(self,obj): 460 self._varshape = getattr(obj, '_varshape', ()) --> 461 MaskedArray.__array_finalize__(self, obj) 462 463 def _update_from(self, obj): C:\Programme\pythonxy\python\lib\site-packages\numpy\ma\core.pyc in __array_finalize__(self, obj) 1383 """ 1384 # Get main attributes ......... -> 1385 self._update_from(obj) 1386 if isinstance(obj, ndarray): 1387 odtype = obj.dtype C:\Programme\pythonxy\python\lib\site-packages\scikits\timeseries\tseries.pyc in _update_from(self, obj) 466 # Only update the dates if we don't have any 467 if not getattr(_dates, 'size', 0): --> 468 self.__setdates__(newdates) 469 MaskedArray._update_from(self, obj) 470 C:\Programme\pythonxy\python\lib\site-packages\scikits\timeseries\tseries.pyc in __setdates__(self, value) 662 if not varshape: 663 # We may be using the default: retry --> 664 varshape = self._varshape = get_varshape(self, value) 665 # Get the data length (independently of the nb of variables) 666 dsize = self.size // int(np.prod(varshape)) C:\Programme\pythonxy\python\lib\site-packages\scikits\timeseries\tseries.pyc in get_varshape(data, dates) 260 # More dates than data: not good 261 if (dates.size > data.size) or (data.ndim == 1): --> 262 raise TimeSeriesCompatibilityError(*err_args) 263 #.................... 264 dcumulshape = np.cumprod(dshape).tolist() TimeSeriesCompatibilityError: Incompatible sizes! (data: (1,) <> dates: (15360,)) Please give me a hint here. Timmie