MATLAB: Best way to programmatically detect new graphics engine

r2014bgraphics

I'm sure this has been asked before, but I couldn't find it: What is the recommended method for programming a check to see if Matlab is using the new graphics engine? Just check if ver >=2014b, or is there a better way?

Best Answer

~verLessThan('matlab','8.4')

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MATLAB: How to unfix the seed with Matlab engine

Every time you call matlab.engine.start_matlab you're starting a new MATLAB process. See this documentation page for how to "Generate Random Numbers That Are Different".

MATLAB: How can i fix the problem with BLDC engine

In your line

dy(1)=(U-p*w.*(Maa.*I+dPsiQ.*(S.*cos(p*(v))-C.*sin(p*v))+dPsiD.*(C.*cos(p*(v))-S.*sin(p*v)))-p*X2*Gaa.*I-Ra*I)./La;

your Gaa is empty, so the entire expression will come out empty.

You defined Gaa as

Gaa=(Ld-Lq).*(C.*Cd+S.*Sd)+(Ld-Lq).*((C.*Cd-S.*Sd).*cos(2*p.*t)+(C.*Cd+S.*Sd).*sin(2*p.*t));

which comes out empty because both Cd and Sd are empty.

Your Cd and Sd are empty because that is the default for global variables until a value is assigned to them. You never assigned a value to those two variables. In your main function you have

% Cd=1;
% Sd=1;

which are commented out.

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