matlabFunction keeps running forever

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M Al Mamun 2020-7-24

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https://ww2.mathworks.cn/matlabcentral/answers/570292-matlabfunction-keeps-running-forever

评论： M Al Mamun 2020-7-25

Hello all,

I have a Jacobian matrix of 5420-by-5420 which contains symbolic expressions. Then I use matlabFunction to make the Jacobian a function handle. However, it keeps running forever. I don't know if it is freezed/hanged. The sample code is below.

jac=matlabFunction(Jacobian, 'Vars',{[h],[y],[x0],[Pload],[Qload]});

What is the reason that it keeps running? Could anyone please help me regarding this? Thanks in advance.

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Walter Roberson 2020-7-25

You are asking it to create more than 25 million elements... it is going to take a while.

M Al Mamun 2020-7-25

Yeah I understand now. matlabFunction roughly does 520 elements per second. So, it's gonna take around 15 hours for 5420*5420 = 29376400 elements. Thank you.

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