Compute segment lengths from a PhysioExperiment and skeleton

Calculates the Euclidean distance between connected keypoints for each frame. The PhysioExperiment must contain position_x, position_y, and (optionally) position_z assays with columns matching skeleton keypoint labels.

Usage

get_segment_lengths(pe, skeleton)

Arguments

pe

A PhysioExperiment object with position assays.

skeleton

A SkeletonModel object whose keypoint labels match column names in the position assays.

Value

A matrix of segment lengths with dimensions (n_frames x n_bones). Column names are bone names.

References

Winter DA (2009). "Biomechanics and Motor Control of Human Movement." 4th ed. Wiley.

See also

SkeletonModel(), get_bone_connections(), get_limb_pairs()

Examples

if (FALSE) { # \dontrun{
pe <- readOpenPose("path/to/frames/", model = "BODY_25")
sk <- define_skeleton("BODY_25")
lengths <- get_segment_lengths(pe, sk)
} # }