MATLAB: Error using Horzcat. Undefined function or variable ‘opaque’ for input arguements of type double.

errorhorzcatMATLABsimulink

I have a sim command which is calling my simulink model from my MATLAB script. The arguements are all assignin to the base workspace for the simulink model so it should be calling them ok.

However when trying to run the script I get the error:

Error evaluating expression '[list of inputs]' for 'Input' specified in the Configuration Parameters dialog for block diagram 'my model' : The following error occurred converting from double to opaque:  
Error using horzcat
Undefined function 'opaque' for input arguements of type 'double'.

Best Answer

Try to Ctrl+D (update) your model or run the simulation of your model by click the "Run" button, Simulink will report the error regarding the particular block and you need to resolve the error first.

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MATLAB: Do I receive a “Data type mismatch” error when using a data type other than double in the subsystem in Simulink 6.2 (R14SP2)

This error message may be caused by the Fixed-Point settings for the subsystem, for example if the the "data type override" property is set to "True doubles".

To work around this issue, set the data type override to "use local settings".

You can open the Fixed-Point settings dialog from the context menu of your subsystem or from the "Tools" menu of the Simulink model.

MATLAB: Plot opaque element above transparent object

The code draws the polygons in the same z==0 plane. The transparency activates the OpenGL renderer. The renderer has to decide the order of patchs along the view direction, but this order is not well defined in OpenGL, because the renderer does not have any information about the order the objects have been defined inside Matlab - in opposite to the Painters renderer.

So try this:

figure
polygon1=fill3([1 3 3 1],[1 1 3 3],[1,1,1,1], 'r','FaceALpha',0.5);
hold on
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ylim([0 5])
pause(1)
view(2)

Best Answer

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MATLAB: Plot opaque element above transparent object

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