How to plot a polynomial of which I have coefficient vector?
86 次查看(过去 30 天)
显示 更早的评论
I have only coefficient: how to plot it?
0 个评论
回答(4 个)
Walter Roberson
2019-1-31
t = linspace(-10,10); %adjust as needed
plot(t, polyval(a, t)); % where a is coefficients of a polynomial
0 个评论
Jyotish Robin
2018-2-8
Hi Luigi,
Hopefully, the command 'fplot' can be helpful. For example,
a=[1 2 3]; % coefficients
fplot(@(x) a(1)*x+ a(2)*(x .^2)+a(3)*(x.^3))
will plot a polynomial function in x.
Hope this helps!
Thanks,
Jyotish
0 个评论
Timothy Simon Thomas
2020-6-3
编辑:Timothy Simon Thomas
2020-6-3
Config
s=10
t=[-s:0.00001:s];
x=t;
Parameters
a=1
b=-6
c=11
d=-6
Equation
fx=(a*(x.^3)) + (b*(x.^2)) + (c.*x) + d;
syms x1
fx1=(a*(x1.^3)) + (b*(x1.^2)) + (c.*x1) + d;
solve(fx1==0,x1)
Plotting
plot(t,fx)
axis([-s,s,-s^2,s^2])
Draw Axes
line([0 0],[-s^2 s^2])
line([-s s],[0 0])
title('Cubic and lower Polynomial Visualiation')
0 个评论
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Polynomials 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!