How can I change penwidth in 'DrawLine' in Psychtoolbox?

%%This is what the tutorial says:

Screen('DrawLine', windowPtr [,color], fromH, fromV, toH, toV [,penWidth]);

%%so I did like:

[wPtr, rect] = Screen('OpenWindow', 0)

Screen('DrawLine', wPtr, [180, 40, 80], 1000, 800, 1600, 1200, [10]);

Screen('Flip', wPtr);

%%I also tried:

[wPtr, rect] = Screen('OpenWindow', 0)

Screen('DrawLine', wPtr, [180, 40, 80], 1000, 800, 1600, 1200, 10);

Screen('Flip', wPtr);

but neither of them can change the penwidth of line.. plz help me

[Walter Roberson]

This sounds more like a Psychtoolbox problem than a MATLAB problem.

Answer 1

[Stalin Samuel]

screen examples

Answer 2

[Olivia Krieger]

Use widths 7 and below.