Ensemble decoder: average confusion matrices (top row) and decoder performance (bottom panel) as a function of the number of units in the decoder. The order of call types in the confusion matrices is the same as in the confusion matrices in (A). The solid black line in the bottom plot is the average PCCZ+Testimated over 10,000 ensembles obtained by sampling from 100 neurons (for ensembles of 1 and 2, only 100 and 4,950 different ensembles can be sampled). The blue lines quantify the decoder performance by estimating the mutual information from the confusion matrices as in Elie and Theunissen7(right y axis). The dashed lines are the performance of the neuronal ensembles in the top 10%. Note the differences of the probability scale between (A) and (B). Corrected standard errors of the mean PCC ranged between 0.24%, for ensembles of 1 unit, and 1.17% for ensembles of 20 units and are not shown on the graph.
