How to pass a double value by reference

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Cordell Smith 2018-6-21

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/406857-how-to-pass-a-double-value-by-reference

评论： dpb 2018-6-22

We are using a COM Function that takes output doubles as an argument. When I tried to pass regular Matlab double values, I get this error.

Error using COM.Afgrow_Application/invoke
Error: Type mismatch, argument 1

I think this is because the type of the variable is “ out double ” Which is passed by reference.

%This Line Launches the afgrow application
afgrow = actxserver('Afgrow.Application');
%Set Units to English, 1 for metric
set(afgrow, 'Units', 0);
%Sets Spectrum to Constant Amplitude
invoke(afgrow, 'ConstAmplitudeSpectrum', 0)
%Set Multiplication Factor to 13.5
set(afgrow, 'SMF', 13.5);
%Set Initial Crack Length in C Direction to .05
set(afgrow, 'Visible', 1);
%invoke(afgrow, 'RunFrozPredict', cyc)
invoke(afgrow,'model',1030);
le=cell(2,2);
le=[0.05,0.05;0.05,0.05];
cyc = 0;
fc = 0;
fkc = 0;
fa =0;
fka = 0;
fct =0;
fkct =0;
invoke(afgrow, 'RunFrozPredict',cyc, fc, fkc, fa, fka, fct,fkc);
invoke(afgrow, 'CalculateBetas',le)
invoke(afgrow, 'RunPredict')