Example of simulated long-term recording number 24. The spikes were separated in blocks as explained in the Method section (19 blocks in this example). The mean waveforms of the simulated neurons (classes) in the first block are shown in the left panel. In the middle panel the peak to peak amplitude of each spike is shown color-coded, so the drifting dynamics of each class can be seen. The vertical lines indicate the separation between blocks. Finally, the right panel shows the mean waveforms of the neurons during the last block. In this simulation, half of the neurons increased their amplitude and the other half decreased it.