#### Previous topic

scipy.signal.decimate

#### Next topic

scipy.signal.resample

# scipy.signal.detrend

`scipy.signal.``detrend`(data, axis=-1, type='linear', bp=0)

  Remove linear trend along axis from data.

  Parameters: | data : array_like The input data. axis : int, optional The axis along which to detrend the data. By default this is the last axis (-1). type : {‘linear’, ‘constant’}, optional The type of detrending. If `type == 'linear'` (default), the result of a linear least-squares fit to data is subtracted from data. If `type == 'constant'`, only the mean of data is subtracted. bp : array_like of ints, optional A sequence of break points. If given, an individual linear fit is performed for each part of data between two break points. Break points are specified as indices into data.
  Returns: | ret : ndarray The detrended input data.

  Examples

      >>> from scipy import signal
      >>> randgen = np.random.RandomState(9)
      >>> npoints = 1000
      >>> noise = randgen.randn(npoints)
      >>> x = 3 + 2*np.linspace(0, 1, npoints) + noise
      >>> (signal.detrend(x) - noise).max() < 0.01
      True