How to find total derivative by using total derivative operator?
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I have two functions
and
.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/535966/image.png)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/535971/image.png)
I want to find the total derivative of
.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/535976/image.png)
where
is as given in the attached file
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/535981/image.png)
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回答 (1 件)
Bjorn Gustavsson
2021 年 3 月 2 日
If you have the symbolic toolbox it is just to get to work:
syms x y t
syms u(x,y,t)
syms p(x,y,t)
dudx = diff(u*p,x) % etc...
Then just to add up the different derivatives.
HTH
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