find the coefficient of polynomial

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Dung Tran Hoang
Dung Tran Hoang il 22 Apr 2020
Risposto: Image Analyst il 22 Apr 2020
i have a table below that list value of function f(x) at various points
x | 1.0 | 1.3 | 1.6 | 1.9 | 2.2
f(x) | 0.7651977 | 0.6200860 | 0.4554022 | 0.2818186 | 0.1103623
Anyone know how to find the coefficient of polynomial of f(x) = A + + C(x^2) + D(x^3)
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dpb
dpb il 22 Apr 2020
Type
lookfor polyf
at command line...
Steven Lord
Steven Lord il 22 Apr 2020
Search the documentation for the word "polynomial".
docsearch polynomial

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Image Analyst
Image Analyst il 22 Apr 2020
Use polyfit():
coefficients = polyfit(x, fx, 3);
D = coefficients(1);
C = coefficients(2);
B = coefficients(3);
A = coefficients(4);

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