sym, symfun, and function handle

Question

Hoang Minh Le 2022-12-20

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1882097-sym-symfun-and-function-handle

回答： Rohit 2023-1-11

syms y1(x) y2
y1(x) = x^2      % symfun
y2    = x^2      % sym
y3    = @(x) x^2 % function handle

I am on day 1 of learning symbolic toolbox.

My question is about how to use the functions above appropriately.

My understandings so far:

Between y1 and y2, I understand that y2 needs sub() to evaluate.
(Answered somewhere on the forum) y3 has better excute time for numeric substitution

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Answer 1

Rohit 2023-1-11

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https://ww2.mathworks.cn/matlabcentral/answers/1882097-sym-symfun-and-function-handle#answer_1146200

Hello,

In order to better understand the use of these functions, I am sharing the documentation of “sym”, function handles and the documentation link for symbolic Math Toolbox which contain examples to help you get started. Below are the links for the same:

https://www.mathworks.com/help/symbolic/index.html

https://www.mathworks.com/help/symbolic/choose-syms-or-sym-function.html

https://www.mathworks.com/help/matlab/function-handles.html