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Table 4 Comparison of joint torque estimation for models trained with two, five, and eight SEMG channels.

From: Comparison of regression models for estimation of isometric wrist joint torques using surface electromyography

Model 8 channels 5 channels 2 channels
   NRMSE R a 2 NRMSE R a 2 NRMSE R a 2
PBM Mean 2.73% 0.85 3.07% 0.86 4.59% 0.77
  STD 0.97% 0.13 1.03% 0.11 1.32% 0.19
OLS Mean 2.88% 0.84 3.17% 0.77 4.82% 0.63
  STD 0.94% 0.11 1.06% 0.13 1.81% 0.23
RLS Mean 2.83% 0.82 3.11% 0.79 4.73% 0.69
  STD 0.93% 0.10 1.01 0.11 1.31% 0.18
SVM Mean 2.85% 0.82 3.00% 0.80 4.77% 0.73
  STD 1.00% 0.09 1.04% 0.10 1.02% 0.14
ANN Mean 2.82% 0.82 3.03% 0.81 4.74% 0.69
  STD 0.95% 0.09 1.05% 0.12 1.17% 0.18
LWPR Mean 3.03% 0.75 3.19% 0.78 4.97% 0.69
  STD 1.14% 0.21 1.19% 0.13 1.31% 0.21