Error using symengine DOUBLE cannot convert the input expression into a double array.

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Syed Adeel 2020-4-22

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/519820-error-using-symengine-double-cannot-convert-the-input-expression-into-a-double-array

评论： Star Strider 2020-4-22

在 MATLAB Online 中打开

I call function in my main script as

[vn]=noise_example_plot(tfv);

Now without using Vn value it starts giving me error. If i comment out this function call from my script then all runs ok. But as i call it , it gives following error

Error using symengine
DOUBLE cannot convert the input expression into a double array.
Error in sym/double (line 613)
        Xstr = mupadmex('symobj::double', S.s, 0);
Error in Model_AnalogSection_ASD_ (line 137)
da3td = double(y2t);

zci = @(v) find(v(:).*circshift(v(:), [1 0]) <= 0);                    % Returns Approximate Zero-Crossing Indices Of Argument Vector
da3td = double(y2t);%Line 17
idx = zci(da3td);
if da3td(1) * da3td(end) < 0
    idx = idx(2:end);
end
for k = 1:numel(idx)
    t_exact(k) = interp1(da3td(idx(k))+[-1 +1]*1E-5, time(idx(k))*1E9+[-1 +1], 0);
    
end
hold on;

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darova 2020-4-22

Can you show something more?

Star Strider 2020-4-22

The error that line throws is likely due to a symbolic variable being in ‘y2d’. Without seeing ‘y2d’ it is not possible to offer a solution (if one exists).

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