eyelinkReader (version 1.0.3)

plot.eyelinkRecording: Plot fixations and saccades for a set of trials

Description

This is only a basic plotting utility intended primarily for a quick visual check. Please refer to companion vignette on plotting for details about geoms and implementing your own custom plotting routine.

Usage

# S3 method for eyelinkRecording
plot(
  x,
  trial = 1,
  show_fixations = TRUE,
  fixation_size_property = "duration",
  size_legend = ifelse(fixation_size_property == "duration", "Fixation duration [ms]",
    NA),
  show_saccades = TRUE,
  saccade_color_property = "sttime_rel",
  color_legend = ifelse(saccade_color_property == "sttime_rel", "Saccade onset [ms]", NA),
  background_grobs = NULL,
  ...
)

Value

ggplot object

Arguments

x

eyelinkRecording object

trial

Trials to be plotted, could be a scalar index, a vector of indexes, or NULL (all trials). Defaults to 1.

show_fixations

logical, whether to draw fixation as circles. Defaults to TRUE.

fixation_size_property

Which fixation property is used as circle aesthetics. Defaults to "duration".

size_legend

An optional legend title, defaults to "Fixation duration [ms]" if fixation_size_property is "duration" and to NA otherwise. In the latter case, the legend title is unmodified (i.e., determined by ggplot).

show_saccades

logical, whether to draw saccades as line segments. Defaults to TRUE.

saccade_color_property

Which saccade property is used as color aesthetics. Defaults to "sttime_rel" (onset time relative to the trial start).

color_legend

An optional legend title, defaults to "Saccade onset [ms]" if saccade_color_property is "sttime_rel" and to NA otherwise. In the latter case, the legend title is unmodified (i.e., determined by ggplot).

background_grobs

ggplot2 graphic objects add to the plot before plotting data.

...

Addition parameters (unused)

Examples

data(gaze)

# fixations and saccades for the first trial
plot(gaze)

# fixations for the all trials
plot(gaze, trial = NULL, show_saccades = FALSE)

# saccades for the first two trials
plot(gaze, trial = 1:2, show_fixations = FALSE)

# color codes duration of a saccade
plot(gaze, saccade_color_property = "duration")