Have I used polyfit/polyval correctly
1 view (last 30 days)
Show older comments
I am just trying to get used to the polyfit and polyval function.
My question says to use the polyfit and polyval functions to approximate price for N=1 N=5 N=10 and plot the approximation
I have my data file as a 15x5 double with prices being the 5th column day being the first column. I have written.
day = Data(:,1)); %first column of days
price =Data(:,5) ; %data we want to approximate
T = table(day, price); %create a table for easier computation
for i=[1 5 10] %N values
[p,~,mu] = polyfit(T.day, T.price, i);
f = polyval(p,day,[],mu);
plot(day,price) %plot of prices
hold on
plot(day,f) %approximation plot
end
Im just wondering if I am correct in how I have done that. the approximations seem in line with the graph but I cant see were I've approximated price
0 Comments
Answers (0)
See Also
Categories
Find more on Financial Toolbox in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!