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Last data update: 2014.03.03

R: Interactive Diagnostic Plot of Samples and Fixations

diagnostic.plot

R Documentation

Interactive Diagnostic Plot of Samples and Fixations

Description

Shows the raw samples and the detected fixations in an interactive plot. This plot can be used to screen the data and to diagnose problems with the fixation detection.

Usage

diagnostic.plot(samples, fixations)

Arguments

samples

a data frame containing the raw samples as recorded by the eye-tracker. This data frame has to have the following columns:

time:: the time at which the sample was recorded
x:: the x-coordinate of the sample
y:: the y-coordinate of the sample

Samples have to be listed in chronological order. The velocity calculations assume that the sampling frequency is constant.

fixations

a data frame containing the fixations that were detected in the samples. This data frame has to have the following columns:

start:: the time at which the fixations started
end:: the time at which the fixation ended
x:: the x-coordinate of the fixation
y:: the y-coordinate of the fixation

Value

A recording of the final plot. Can be re-plotted using replayPlot.

Details

The function will open an interactive plot showing the samples and fixations. Red dots represent the x-coordinate and orange dots the y-coordinate. The gray vertical lines indicate the on- and offsets of saccades and horizontal lines the coordinates of the fixations. Instructions for navigating the plot are displayed on the console.

Author(s)

Titus von der Malsburg malsburg@posteo.de

Examples

## Not run: 
data(samples)
fixations <- detect.fixations(samples)
diagnostic.plot(samples, fixations)

## End(Not run)