This is my final proect for Numerical Methods that must be done in MATLAB. I wil

Question

This is my final proect for Numerical Methods that must be done in MATLAB.  I will add more points if needed.  I do not know how to use MATLAB very well.  If you can help give me your email i address and i will send you the file that contains the data for the project.  Thanks!

This is my final proect for Numerical Methods that must be done in MATLAB. I will add more points if needed. I do not know how to use MATLAB very well. If you can help give me your email i address and i will send you the file that contains the data for the project. Thanks!

Explanation / Answer

Hi, I dont have the data but have written the code for the lagrange interpolation method, which has to be used in the first code.

function yint = Lagrange(x,y,xx)

% Lagrange: Lagrange interpolating polynomial

% yint = Lagrange(x,y,xx): Uses an (n - 1)-order

% Lagrange interpolating polynomial based on n data points

% to determine a value of the dependent variable (yint) at

% a given value of the independent variable, xx.

% input:

% x = independent variable

% y = dependent variable

% xx = value of independent variable at which the

% interpolation is calculated

% output:

% yint = interpolated value of dependent variable

n = length(x);

if length(y)~=n, error('x and y must be same length'); end

s = 0;

for i = 1:n

product = y(i);

for j = 1:n

if i ~= j

product = product*(xx-x(j))/(x(i)-x(j));

end

end

s = s+product;

end

yint = s;

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