How can I find the coefficients of this polynomial?

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Boran Kolcu 2020-11-17

评论： Boran Kolcu 2020-11-17

I need to find the coefficients of the polynomial

that passes through the points (0, 10), (1, 35), (3, 31) and (4, 2).

I appreciate it a lot if anyone can help.

Stephan 2020-11-17

编辑：Stephan 2020-11-17

x = [0 1 3 4];
y = [10 35 31 2];
coeffs = polyfit(x,y,3)
plot(0:0.1:5,polyval(coeffs,0:0.1:5),'b-')
hold on
scatter(x,y,'bo')
hold off

John D'Errico 2020-11-17

Probably should not do what is clearly homework, with no effort made by the poster.

Boran Kolcu 2020-11-17

it works, thans ever so much!

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