how to plot a graph of the equation (x^5)+(x^4)+(x^3)+(9*x^2)+8*x+3
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how to plot a graph of the equation (x^5)+(x^4)+(x^3)+(9*x^2)+8*x+3 in matlab, i have tried using the plot function but it is still not working out. i also need it in the range of -8<x<6
i have used x[-8:1:6] and y=(x^5)+(x^4)+(x^3)+(9*x^2)+8*x+3 plot (x,y,'r')
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回答 (3 件)
Azzi Abdelmalek
2014 年 3 月 26 日
coeff=[1 1 1 9 8 3] % the coefficients of your polynomial
x=-8:0.1:6
y=polyval(coeff,x)
plot(x,y,'r')
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Joseph Cheng
2014 年 3 月 26 日
編集済み: Joseph Cheng
2014 年 3 月 26 日
You'll need to include the element-wise power in your y equation. instead of just ^ you will need to use .^
y=(x.^5)+(x.^4)+(x.^3)+(9*x.^2)+8*x+3
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