Home: Mini Project 3

Results 2

hc-1, data from four experiments

Four experiments, spike waveforms recorded on four channels per intracellular spike times (GT = ground truth).
All waveform plots in the same row belong to the same experiment and class.
  • Class 1: d533101.dat
  • Class 2: d561103.dat
  • Class 3: d611107.dat
  • Class 4: d1453103.dat
    Although these class 3 and 4 waveforms are not distinguishable to the human eye,
    the neural network appears to do a surprisingly good job of classifying them in a
    test set after being trained on examples, but in reality this training set is biased
    by the number examples in class 3 (243 per channel) versus class 4 (1636 per channel).


    Using NN with 10 artificial neurons to classify extracelluar spike waveforms from biological neurons.
  • Class 1: d533101.dat
  • Class 2: d561103.dat
  • Class 3: d561104.dat
  • Class 4: d1453103.dat
  • Class 5: d611107.dat (new data from a separate experiment)
    The new class 5 waveforms are in row 5 in the figure below.
    These waveforms were not used as training examples, and yet
    they were "recognized" as class 4 waveforms ... not surprising.

    hc-1, data from five experiments