fit data with a line

ok

[darova]

please don't remove your question

Answer 1

[Ameer Hamza]

Try something like this

x = linspace(0, 1, 100);
y = 3*x + 2 + rand(size(x));

pf = polyfit(x, y, 1);
y_pred = polyval(pf, x);

r2 = rsquare(y, y_pred); % R-squared
sse = sum((y-y_pred).^2); % SSE

[Sarah Smith]

is rsqaure a function?

[Ameer Hamza]

Oh! I forgot to mention, rsquare is from this FEX package: https://www.mathworks.com/matlabcentral/fileexchange/34492-r-square-the-coefficient-of-determination