Number of times a point is crossed — point

Checks how often a number (relevant_point) is being crossed by an number sequence (numeric_vector).

Usage

point_crosses(numeric_vector, relevant_point = 0)

Arguments

numeric_vector: Numbers, ordered by their time of appearance.
relevant_point: Number which has to be crossed.

Value

Number of times that numeric_vector crosses the relevant_point (0 to +Inf).

Details

The supplied vectors are assumed to be ordered by time.

References

Wirth, R., Foerster, A., Kunde, W., & Pfister, R. (2020). Design choices: Empirical recommendations for designing two-dimensional finger tracking experiments. Behavior Research Methods, 52, 2394 - 2416. doi:10.3758/s13428-020-01409-0

Examples

x_vals <- c(-1, 1, -1, 1, -1, 1)
point_crosses(x_vals, 0)
#> [1] 5
point_crosses(x_vals, 1)
#> [1] 0
point_crosses(x_vals, -1)
#> [1] 0