Psychtoolbox-3

Psychophysics Toolbox Version 3 (PTB-3) is an open-source set of Matlab and GNU Octave functions for vision and neuroscience research. It makes it easy to synthesize and show accurately controlled visual and auditory stimuli and interact with the observer. Some of its functionality is available as part of Python toolkits like PsychoPy. For licenses, commercial support and services visit psychtoolbox.net. Follow us on Mastodon, BlueSky, or Twitter @psychtoolbox

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Circle

>Psychtoolbox>PsychOneliners

cirbool = Circle(rad)

Circle creates a Circle with diameter == ceil(2*rad)
Ellipse returns a (tighly-fitting) boolean matrix which is true for all
points on the surface of the Ellipse and false elsewhere

Path   Retrieve current version from GitHub | View changelog
Psychtoolbox/PsychOneliners/Circle.m

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Last updated on April 26, 2025