cross_validation.py 文件源码

def _segpoints(self, stimulus):
        """Find segmentation points."""
        stim_diff = np.diff(stimulus)
        changepoints = np.nonzero(stim_diff)[0]
        changepoints = np.hstack([0, changepoints, stimulus.size])
        changepoints_diff = np.diff(changepoints)
        segpoints = changepoints[:-1] + np.fix(changepoints_diff/2)
        segpoints = segpoints[0::2] # Sub-sample every 2 points
        return segpoints