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https://github.com/schw4b/emov
An R CRAN package for fixation and saccade detection in eye movement recordings.
https://github.com/schw4b/emov
Last synced: 12 days ago
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An R CRAN package for fixation and saccade detection in eye movement recordings.
- Host: GitHub
- URL: https://github.com/schw4b/emov
- Owner: schw4b
- License: gpl-3.0
- Created: 2015-04-08T12:41:44.000Z (over 9 years ago)
- Default Branch: master
- Last Pushed: 2016-05-30T19:15:23.000Z (over 8 years ago)
- Last Synced: 2023-11-20T12:22:02.777Z (about 1 year ago)
- Language: R
- Homepage:
- Size: 496 KB
- Stars: 10
- Watchers: 3
- Forks: 2
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: COPYING
Awesome Lists containing this project
README
# emov
[![CRAN version](http://www.r-pkg.org/badges/version/emov)](http://cran.r-project.org/package=emov)
An R package for fixation and saccade detection in eye tracking recordings. Eye movements consist of alternating saccades and fixations. This package implements a dispersion-based algorithm (I-DT) proposed by Salvucci & Goldberg (2000) and detects fixations in the first place, compared to the velocity threshold algorithms which detect saccades.
## Install from CRAN
install.packages("emov")## Manual installation
unzip emov-master.zip
mv emov-master emov
R --vanilla CMD INSTALL --build emov## Getting started: Running the Demo
library("emov")
demo(fivesec, package="emov")
?emov.idt
![alt tag](/inst/images/plot.png)## Getting started: An Example
library("emov")
data(fivesec)Low pass filtering of the data:
fivesec$x = filter(fivesec$x, rep(1/3, 3))
fivesec$y = filter(fivesec$y, rep(1/3, 3))Fixation detection with a dispersion of 2 cm, and a minimal fixation duration of 20 samples (corresponds to 100 ms, 200 Hz tracker). In the sample data, 2 cm at a viewing distance of 80 cm corresponds to 1.43 degrees.
emov.angdia(2, 80)
fixations = emov.idt(fivesec$time, fivesec$x, fivesec$y, 2, 20)
start end dur x y
1 0.000 0.275 0.275 0.4417061 -7.288781
2 0.285 0.460 0.175 3.4010389 -7.564090
3 0.485 0.705 0.220 9.9452156 -7.369493
4 0.715 0.900 0.185 6.4235088 -7.560851
5 0.945 1.175 0.230 19.1238156 -7.768803
6 1.190 1.355 0.165 23.4139510 -7.589660
7 1.445 1.630 0.185 26.7930263 -7.301396
8 1.645 2.005 0.360 30.2128219 -6.922623
9 2.220 2.465 0.245 -18.0343467 -10.677866
10 2.475 2.790 0.315 -17.1090937 -10.375125
11 2.810 3.205 0.395 -10.2890283 -9.988374
12 3.245 3.530 0.285 1.0143391 -10.091091
13 3.545 3.875 0.330 -2.5099814 -10.060751
14 3.915 4.390 0.475 7.7836712 -10.367486
15 4.450 4.600 0.150 18.6530860 -9.983666
16 4.625 4.875 0.250 24.1802288 -10.188763## Update package to newest CRAN version
packageVersion("emov")
detach("package:emov", unload=TRUE)
install.packages("emov")
library("emov")
packageVersion("emov")## Unload package
detach("package:emov", unload=TRUE)## Uninstall package
R --vanilla CMD REMOVE emov## Reference
Salvucci, D. D., & Goldberg, J. H. (2000). Identifying fixations and saccades in eye-tracking pro-
tocols. In Proceedings of the 2000 symposium on eye tracking research & applications (pp. 71-78).
New York: ACM.