How to get equation from each plot?
35 views (last 30 days)
Show older comments
Okinawa Rikenata
on 25 Jan 2018
Commented: Okinawa Rikenata
on 25 Jan 2018
So I have this code:
wkt is 117*1 array
x is also 117*1 array
a=polyfit(wkt,x);
b=polyval(a,wkt);
figure
plot (wkt,x)
hold on
plot (wkt,b)
Then I get a figure with 2 different plots. My problem is how to get the equation for each plot so I can evaluate the area between 2 curves. If I use this
a=trapz(wkt,x)-trapz(wkt,b)
will I get a correct result? Or is there another way? Thank you.
0 Comments
Accepted Answer
Walter Roberson
on 25 Jan 2018
https://www.mathworks.com/help/matlab/ref/polyint.html polyint will integrate directly from the polynomial coefficients.
More Answers (0)
See Also
Categories
Find more on Polynomials 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!