How to create a symbolic general (without explicit definition) function?

4 views (last 30 days)
Hi all,
I want to know how to create a general function in symbolic way. My goal is to examine the differentials of the overall function in terms of a variable, where there are some functions of this variable that I am not interested in. I checked some documents, all ask me to explicitly define those functions.
Here is a example I am thinking of, which is realized in the psudo code:
syms x g real
f = x*g(x);
fdx = simplify(diff(f,x))
where g is the general function that I want to create. Therefore, this code is supposed to give me the result like:
fdx = g(x)+x*ddxg(x)
Since I really don't care the expression of g(x), a representation like ddxg(x) is what I want in the result.
Thanks in advance!

Accepted Answer

Prudhvi Peddagoni
Prudhvi Peddagoni on 12 Mar 2021
Hi,
You need to specify that g is a function of x like this:
syms x g(x)
f = x*g;
fdx = diff(f,x);
Hope this helps.

More Answers (0)

Tags

Products


Release

R2019a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by