find the coefficient of polynomial

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)

[dpb]

Type

lookfor polyf

at command line...

[Steven Lord]

Search the documentation for the word "polynomial".

docsearch polynomial

Answer 1

[Image Analyst]

Use polyfit():

coefficients = polyfit(x, fx, 3);
D = coefficients(1);
C = coefficients(2);
B = coefficients(3);
A = coefficients(4);