Using Psychtoolbox to make circles.

Does anyone know how i create 8 circles in Matlab using PTB that look like the image below:

With a fixation point in the middle. Thank you.

Answer 1

[Walter Roberson]

http://www.martinszinte.net/Martin_Szinte/Teaching_files/Prog_c5.pdf circle drawing in Psychtoolbox

Answer 2

[Image Analyst]

No - I don't have that toolbox. But you can use viscircles() in the Image Processing Toolbox, or draw it yourself using the FAQ: http://matlab.wikia.com/wiki/FAQ#How_do_I_create_a_circle.3F