get(0,'Mon​itorPositi​ons') outputs wrong values

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Z.P.
Z.P. 2018-10-26
编辑： adams13 2025-9-30，13:03
Hello,
I have a big issue with the outputs from
get(0,'MonitorPositions')
when the screen is changed within one MATLAB session!
For example:
I start my PC and run my Monitors at my standard resolution. Then I type
get(0,'MonitorPositions')
and it is just fine.
But when i plug in a projector for example or change the resolution of my screen and just run the same code
get(0,'MonitorPositions')
then it outputs the same values like before even though the resolution obviously changed!
I have written a function that needs the correct resolution of the attached displays, but now it is just a desaster.
Hope someone can help me.

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回答（1 个）

Adam Danz
Adam Danz 2018-10-26
编辑：Adam Danz 2018-10-26
As stated in the documentation (<- link),
MATLAB® sets the display information values for this property at startup. The values are static. If your system display settings change, the values do not update. To refresh the values, restart MATLAB.
Perhaps this API will come in handy: https://www.mathworks.com/matlabcentral/fileexchange/31437-windowapi
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Stephen23
Stephen23 2018-10-26
"...also don't set it up to automatically receive a message that the screen configuration has changed."
I very doubt that this is trivial to achieve on a multi-OS application.
adams13
adams13 2025-9-30，13:02
编辑：adams13 2025-9-30，13:03
In R2024b under Windows 11, get(0, 'MonitorPositions') looks to dynamically reflect the change, even without restarting MATLAB. After I connect or disconnect an additional monitor, the next call shows correct number of monitors.

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