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. Author manuscript; available in PMC: 2012 Dec 21.
Published in final edited form as: Nat Neurosci. 2012 Jun;15(6):913–919. doi: 10.1038/nn.3105

Figure 6.

Figure 6

Distribution of principal axes of quadratic isoresponse surfaces. The geometry of principal axes can be seen in the 3-D rendered surfaces on the left side of each row. Each point in the normalized cone weight space represents the direction of one principal axis. Points are color coded according to the axis type they represent. Arrows in A point to the three principal axes from example neuron 3 from Figure 2. The arrow in C points to a single axis for example neuron 2. For this neuron, the other two axes did not differ sufficiently in length to be plotted.