interpolate

Extends the zoo::na.approx and zoo::na.spline functions to include a report which provides
the proportion of missing data before and after the interpolation process. This is handy
for evaluating the effectiveness of the repair.

Enables the automation of actions across the pipeline, including
initial steps of transforming binocular data and gap repair to event-based
processing such as fixations, saccades, and entry/duration in Areas of
Interest (AOIs). It also offers visualisation of eye movement and AOI
entries. These tools take relatively raw (trial, time, x, and y form) data
and can be used to return fixations, saccades, and AOI entries and time spent
in AOIs. As the tools rely on this basic data format, the functions can work
with data from any eye tracking device. Implements fixation and saccade
detection using methods proposed by Salvucci and Goldberg (2000)
<doi:10.1145/355017.355028>.

Tom Beesley

eyetools

Analyse Eye Data

Matthew Ivory

interpolate function

<dl><dt>data</dt>
<dd>dataframe with columns time, x, y, trial (the standardised raw data form for eyeproc)</dd>
<dt>maxgap</dt>
<dd>maximum time gap of consecutive trackloss to fill (in ms). Any longer gaps will be left unchanged (see zoo package)</dd>
<dt>method</dt>
<dd>"approx" for linear interpolation or "spline" for cubic spline interpolation</dd>
<dt>sample_rate</dt>
<dd>Optional sample rate of the eye-tracker (Hz) for use with data. If not supplied, the sample rate will be estimated from the time column and the number of samples.</dd>
<dt>report</dt>
<dd>default is FALSE. If TRUE, then the return value is a list containing the returned data frame and the report.</dd></dl>

Arguments

Interpolation of missing data (NAs) — interpolate

<dl>

<dt>data</dt>
<dd>dataframe with columns time, x, y, trial (the standardised raw data form for eyeproc)</dd>


<dt>maxgap</dt>
<dd>maximum time gap of consecutive trackloss to fill (in ms). Any longer gaps will be left unchanged (see zoo package)</dd>


<dt>method</dt>
<dd>"approx" for linear interpolation or "spline" for cubic spline interpolation</dd>


<dt>sample_rate</dt>
<dd>Optional sample rate of the eye-tracker (Hz) for use with data. If not supplied, the sample rate will be estimated from the time column and the number of samples.</dd>


<dt>report</dt>
<dd>default is FALSE. If TRUE, then the return value is a list containing the returned data frame and the report.</dd>

</dl>

interpolate: Interpolation of missing data (NAs)

Description

Usage

Value

Arguments

Details

Examples