Differentiation

Question

Richard 2012-1-17

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https://ww2.mathworks.cn/matlabcentral/answers/26313-differentiation

评论： Walter Roberson 2019-2-16

Is it possible to construct a code that for example we type in x^2 and then the program finds (d/dx)x^2=0 and gives x=0?

I have tried using syms x; diff(x^2) which gives 2*x but I don't know how to make it solve the equation. Perhaps I have to define a function handle? But f=@(x) diff(x^2) doesn't work.

Please help.

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Answer 1

Walter Roberson 2012-1-17

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https://ww2.mathworks.cn/matlabcentral/answers/26313-differentiation#answer_34350

在 MATLAB Online 中打开

solve(diff(x^2))

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Richard 2012-1-17

Thanks, Walter! :-)

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Answer 2

Wayne King 2012-1-17

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https://ww2.mathworks.cn/matlabcentral/answers/26313-differentiation#answer_34351

在 MATLAB Online 中打开

syms x
solve(diff(x^2)==0)

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Richard 2012-1-17

Thanks, Wayne! :-)

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Answer 3

jeevitha kandasamy 2019-2-14

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https://ww2.mathworks.cn/matlabcentral/answers/26313-differentiation#answer_360959

i need matlab c code for integrator ?

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Walter Roberson 2019-2-16

Unfortunately, code generation is not supported for integral(). However, code generation is supported for the older quadgk(), so you can use MATLAB Coder with that.

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