determine_angles: Determine angles as seen by observer

In triangulation: Determine Position of Observer

Description

Determine the angles (between three known points) as seen by an observer with a known position.

Usage

determine_angles(A, B, C, observer_position = c(0, 0), output_plot = TRUE,
  lines_in_plot = TRUE, angles_in_plot = TRUE, decimals_in_plot = 2)

Arguments

A	A point defined by a vector containing an x- and an y-coordinate
B	A point defined by a vector containing an x- and an y-coordinate
C	A point defined by a vector containing an x- and an y-coordinate
observer_position	A vector containing an x- and an y-coordinate
output_plot	Boolean variable indicating whether a plot should be created
lines_in_plot	Boolean variable indicating whether lines should be drawn in the plot
angles_in_plot	Boolean variable indicating whether the angles should be printet in the plot
decimals_in_plot	Integer indicating the number of decimals used

Value

The angles as seen by the observer expressed in radians.

Examples

determine_angles(A = c(0, 0), B = c(10, 0), C = c(5, 5), observer_position=c(4,1))

determine_angles(A = c(0, 0), B = c(10, 0), C = c(5, 5), observer_position=c(4,40),
angles_in_plot = FALSE)

Example output

observer_angle_AB observer_angle_AC observer_angle_BC 
         2.731465          2.060754          1.490966 
observer_angle_AB observer_angle_AC observer_angle_BC 
        0.2485586         0.1282323         0.1203263 

triangulation documentation built on May 2, 2019, 5:34 a.m.