Takes a single value or vector of distances and returns the visual angle equivalent.
Usage
dist_to_visual_angle(
vector,
dist_type = "cm",
view_dist_cm = 60,
screen_width_cm = 51,
screen_width_pixels = 1920
)Arguments
- vector
vector of distances (or single distance)
- dist_type
default is "cm". Specify "pixel" for conversion from pixel values.
- view_dist_cm
viewing distance in cm. Default of 60cm.
- screen_width_cm
used in conversion of pixel values. Default is 51 cm (24" monitor).
- screen_width_pixels
used in conversion of pixel values. Default is 1920 pixels.
Examples
# calculate visual angle for stimulus of 5cm
dist_to_visual_angle(5)
#> [1] 4.771888
# calculate visual angle of stimuli 2 and 10cm width at 50 cm viewing angle
dist_to_visual_angle(c(2,10), view_dist_cm = 50)
#> [1] 2.291526 11.421186
# calculate visual angle of 150 pixel wide
dist_to_visual_angle(150, dist_type = "pixels")
#> [1] 102.6804