Dual Dimensionality Reduction Reveals Independent Encoding of Motor Features in a Muscle Synergy for Insect Flight Control
Fig 7
Comparing feature- and mean torque-based reconstructions.
We compared reconstruction performance with normalized RMS (A) and unexplained variance plots (B; N = 7 animals) as in Fig 6. Low error values indicate better performance. Horizontal lines indicate statistically separate groups. Significant differences exist between the deciles within each distribution (repeated measures ANOVA, P < 0.0001). The RMS of the reconstructed torque waveform with a variable number of features (0–4) is also plotted against the RMS of the measured torque waveform (C) for all the deciles of animal L. Deviation from unity (solid black line) shows the error in the RMS reconstruction. To compare the feature-based independence model to the mean torque (D) and the synergy models (E), we plotted the RMS error of each against the other for all deciles and all animals (N = 70 animal-deciles). Points below the unity line indicate improved performance (smaller error) with the feature-based independence model.