OPI (version 2.9)

opiClose: Close using OPI.

Description

Generic function for closing the chosen OPI implementation that is set with chooseOpi().

Usage

opiClose(...)

Arguments

…

Implementation specific parameters. See details.

Value

Returns NULL if close succeeded, otherwise an implementation dependant error.

Compass

Returns a list of err, which is an error code, and fixations, which is a matrix with three columns: time (same as time_hw in opiPresent), x (degrees relative to the centre of the image returned by opiInitialise - not the PRL), y (as for x), and one row per fixation.

References

Please cite: A. Turpin, P.H. Artes and A.M. McKendrick "The Open Perimetry Interface: An enabling tool for clinical visual psychophysics", Journal of Vision 12(11) 2012.

http://perimetry.org/OPI

See Also

chooseOpi

Examples

# NOT RUN {
chooseOpi("SimGaussian")
if (!is.null(opiInitialize(sd=2)))
    stop("opiInitialize failed")
if (!is.null(opiClose()))
    stop("opiClose failed, which is very surprising!")
# }