how to write polynomial code
显示 更早的评论
how to write a code that:
- Reads any polynomial P
- Finds its roots.
- Shows the degree of the polynomial.
- Calculates P^3 - Plots the polynomials P and P^3 on a suitable domain specified by the user
采纳的回答
Birdman
2017-10-21
syms x
p(x)=x^2+2*x-3;%as an example
Coeff=coeffs(p(x))';
Coeff=wrev(Coeff);
Roots=roots(Coeff);%roots
Degree=length(Coeff)-1;%degrees
disp(p^3)%calculates p^3
x=0:0.1:1;
plot(x,p(x));grid on;%plots
3 个评论
Walter Roberson
2017-10-21
Note that wrev requires wavelet toolbox. You can use flipud() in this context.
Birdman
2017-10-21
Thank you Walter, nice to learn.
Ahmad Dalabeeh
2017-10-21
更多回答（1 个）
Krishan Kumar
2020-9-28
0 个投票
syms x p(x)=x^2+2*x-3;%as an example Coeff=coeffs(p(x))'; Coeff=wrev(Coeff); Roots=roots(Coeff);%roots Degree=length(Coeff)-1;%degrees disp(p^3)%calculates p^3 x=0:0.1:1; plot(x,p(x));grid on;%plots
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