Using operators for syms

Question

Majid kh 2019-2-15

回答： Ayush Modi 2024-8-30

Hi dear, I execute this program:

syms S;
A=1/(S+1);
B=2/(S+3);
Result=A+B

but result is:

Result =
1/(S + 1) + 2/(S + 3)

How can i change result to become format like below?

Result =
(3*S)/( S^2+4*S+3)

Answer 1

Ayush Modi 2024-8-30

Hi Majid,

Please note that; with the given values, the result of adding A and B should be -

(3*S) + 5/( S^2+4*S+3)

Assuming that is the desired result, you can use the "collect" function to simplify the equation.

syms S;

A=1/(S+1);

B=2/(S+3);

Result=A+B

Result =

Result = simplify(Result)

Result =

Result = collect(Result, S)

Result =

Refer to the following MathWorks documentation for more details on "collect" function: