calcBearing: Calculate bearing

In wittja01/ballr: Analyze Data Generated from Syntech Servosphere Trials

Description

Calculates the bearing (direction of movement) for each time step

Usage

calcBearing(list)

Arguments

list	A list of data frames with separate columns for x and y coordinate values.

Details

This function requires that the data has been previously processed with the calcXY() function, providing (x, y) coordinates. Calculate the direction moved by the organism relative to the y axis between each time step in your data frames.

If the data will be aggregated, it is recommended to aggregate the data before running this function.

Value

A list of data frames with a column for the bearing of the organism at each time step.

Examples

# Provide a list of data frames with two columns for the (x, y) coordinates

 servosphere <- list(data.frame(id = rep(1, 200),
                                stimulus = rep(c(0, 1), each = 100),
                                dT = sample(8:12, 200, replace = TRUE),
                                dx = runif(200, 0, 5),
                                dy = runif(200, 0, 5),
                                treatment = rep("a", 200),
                                date = rep("2032018", 200)),
                     data.frame(id = rep(2, 200),
                                stimulus = rep(c(0, 1), each = 100),
                                dT = sample(8:12, 200, replace = TRUE),
                                dx = runif(200, 0, 5),
                                dy = runif(200, 0, 5),
                                treatment = rep("b", 200),
                                date = rep("2032018", 200)))
servosphere <- calcXY(servosphere)

servosphere <- calcBearing(servosphere)

wittja01/ballr documentation built on Sept. 13, 2020, 10:02 p.m.