The combine(S) and horner(p) functions did not work as expected?

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Rarity Brown
Rarity Brown 2024-6-16
移动：Walter Roberson 2024-6-17
Ran in:
Code:
clear i
syms C_F C_L C_GS g_m R_L omega positive
s = i*omega;
Y_in=(1-(s*C_F-g_m)/(1/R_L+s*C_F+s*C_L))*s*C_F+s*C_GS
Y_in = 
Re = real(Y_in)
Re = 
[N,D] = numden(simplify(Re))
N = 
D = 
D-1
ans = 
combine(D-1)
ans = 
horner(D-1)
ans = 
D
D = 
combine(D)
ans = 
horner(D)
ans = 
Behavior:
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Rarity Brown
Rarity Brown 2024-6-17
编辑：Rarity Brown 2024-6-17
Thank you for your reply.
The desired output is in the form of a product of factors that has been combined, like the larger font size formulas on the right side of the image. (a+b)^2=a^2+2ab+b^2
Or is this combination not the expected behavior of the combine function? In that case, is there any function to reach my desired output?

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回答（1 个）

Ganesh
Ganesh 2024-6-17
移动：Walter Roberson 2024-6-17
Ran in:
Hi @Rarity Brown,
The combine function is meant to act as a way to combine the powers of an equation. The horner function will be useful when you have a nested "polynomial" expression. In your case, neither of these functions will be of use. You can infact achieve what youre trying to do with "simplify()".
clear i
syms C_F C_L C_GS g_m R_L omega positive
s = i*omega;
Y_in=(1-(s*C_F-g_m)/(1/R_L+s*C_F+s*C_L))*s*C_F+s*C_GS;
Re = real(Y_in);
[N,D] = numden(simplify(Re));
simplify(D-1)
ans = 

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