Compute visual angle from distance metrics

Takes a single value or vector of distances and returns the visual angle equivalent.

Usage

dist_to_visual_angle(vector, dist_type = "cm")

Arguments

vector

vector of distances (or single distance)

dist_type

default is "cm". Specify "pixel" for conversion from pixel values.

Value

an equivalent-sized object to the input

Examples

# calculate visual angle for stimulus of 5cm
dist_to_visual_angle(5)
#> [1] 4.771888

# calculate visual angle of stimuli 2cm and 10cm width
dist_to_visual_angle(c(2,10))
#> [1] 1.909683 9.527283

# calculate visual angle of 150 pixel wide
dist_to_visual_angle(150, dist_type = "pixels")
#> [1] 102.6804