Reconstruct Data from Synergies

Reconstructs EMG data using a subset of synergies.

Usage

synergyReconstruct(synergy_result, n_synergies)

Arguments

synergy_result

Result from muscleSynergy.

n_synergies

Number of synergies to use for reconstruction.

Value

A list with:

• reconstructed: Reconstructed data matrix

• vaf: VAF of the reconstruction

References

De Luca, C.J. (1997). "The use of surface electromyography in biomechanics." Journal of Applied Biomechanics, 13(2), 135-163. doi:10.1123/jab.13.2.135

See also

muscleSynergy() for computing the initial decomposition, synergyCompare() for comparing synergy solutions

Examples

pe <- make_emg(n_time = 2000, n_channels = 4, sr = 1000)
syn <- muscleSynergy(pe, n_synergies = 3, method = "nmf", seed = 1)
rec <- synergyReconstruct(syn, n_synergies = 2)
rec$vaf
#> [1] 0.5195073