calculate.summary: Calculate Summary Statistics for a Set of Fixations.
In saccades: Detection of Fixations in Eye-Tracking Data

Description Usage Arguments Value Details Author(s) See Also Examples

View source: R/diagnostics.R

Calculates summary statistics about the trials and fixations in the given data frame.

1	calculate.summary(fixations)

fixations

a data frame containing the fixations that were detected in the samples. See detect.fixations for details about the format.

A data frame containing the statistics.

Calculates the number of trials, the average duration of trials, the average number of fixations in trials, the average duration of the fixations, the average spatial dispersion in the fixations, and the average peak velocity that occurred during fixations. Where appropriate standard deviations are given as well. Use round to obtain a more readable version of the resulting data frame.

Titus von der Malsburg malsburg@posteo.de

diagnostic.plot, detect.fixations

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data(fixations)
stats <- calculate.summary(fixations)
round(stats, digits=2)

Loading required package: zoom
                               mean       sd
Number of trials              10.00       NA
Duration of trials         37015.70 16513.25
No. of fixations per trial    97.00    44.22
Duration of fixations        340.00   458.29
Dispersion horizontal          2.60    13.16
Dispersion vertical            2.31     8.41
Peak velocity horizontal       0.06    22.18
Peak velocity vertical        -0.16    13.53