Figure 6

Network performance in the scaling task. Results are from two networks, one that encodes context discontinuously (first two columns) and another that encodes it continuously (third and fourth columns). a: The box encloses all model responses in a single trial with x = -5 and y = 1. The color plot shows all 900 GM responses, color coded. Neurons are arranged by preferred stimulus location along the x-axis and by preferred context along the y-axis. Black traces are the firing rates of the 25 driven output neurons. The black line indicates intended target location (xy = -5); the red line indicates encoded target location (center of mass). Their difference (error) is -0.73. b: A trial with x = -5, y = -1 and error = 0.02. c: A trial with x = 15, y = -1 and error = -1.54. d: A trial with x = 15, y = 0.5 and error = 0.63. e-h: Same combinations of stimulus and context as in a-d, but using a smooth representation for context. Errors are -0.07, 0.34, -1.84, and 0.8, respectively. The variance of each GM rate is equal to its mean (α = 1).