Plot symmetry comparison (left vs right)

Creates a symmetry plot comparing bilateral waveforms, useful for gait symmetry analysis.

Usage

plotSymmetry(
  left,
  right,
  time_axis = NULL,
  ci = 0.95,
  show_diagonal = TRUE,
  plot_type = c("overlay", "scatter"),
  title = "Symmetry Analysis"
)

Arguments

left

Matrix of left side waveforms (time x observations).

right

Matrix of right side waveforms (time x observations).

time_axis

Optional time axis values.

ci

Confidence interval level.

show_diagonal

Logical; show y=x diagonal reference line.

plot_type

"overlay" for time series, "scatter" for L vs R scatter.

title

Plot title.

Value

A ggplot object.

References

Wickham H (2016). "ggplot2: Elegant Graphics for Data Analysis." Springer.

See also

plotWaveformComparison() for multi-group waveform comparisons, calculateStepSymmetry() for quantifying gait symmetry, symmetryIndex() for computing symmetry indices.

Examples

# Compare left and right knee angles
set.seed(123)
t <- seq(0, 100, length.out = 101)
left <- sapply(1:20, function(i) sin(2*pi*t/100) * 30 + rnorm(101, 0, 2))
right <- sapply(1:20, function(i) sin(2*pi*t/100) * 28 + rnorm(101, 0, 2))  # Slight asymmetry

plotSymmetry(left, right, time_axis = t, plot_type = "overlay")