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Computes the index of the peak acceleration of a trajectory, defined by vectors of x and y coordinates, and assumed to be equidistant in time.

Usage

index_max_acceleration(x_vector, y_vector, absolute = FALSE)

Arguments

x_vector

x-coordinates of the executed path.

y_vector

y-coordinates of the executed path.

absolute

Should negative accelerations (i.e., deceleration) be included? Defaults to FALSE.

Value

Single number indicating the index of peak acceleration (1 to +Inf).

Details

The supplied vectors are assumed to be ordered by time with equal time differences.

References

Pfister, R., Tonn, S., Schaaf, M., Wirth, R. (2024). mousetRajectory: Mouse tracking analyses for behavioral scientists. The Quantitative Methods for Psychology, 20(3), 217-229. doi:10.20982/tqmp.20.3.p217

Examples

x_vals <- c(0, 1, 2, 3, 6, 10, 12, 14, 15)
y_vals <- c(0, 0, 0, 0, 0, 0, 0, 0, 0)
index_max_acceleration(x_vals, y_vals)
#> [1] 4
# acceleration maximal between x_vals[4] and x_vals[5]