How do I plot only a couple terms with the coefficients from a fit?
1 Ansicht (letzte 30 Tage)
Ältere Kommentare anzeigen
MathWorks Support Team
am 19 Nov. 2015
Beantwortet: MathWorks Support Team
am 19 Nov. 2015
I have a model function which consists of many terms. Let GG be the cfit results. Using
feval(GG, xdata)
gives the fit using all the terms. Is it possible to plot only a couple terms, e.g. Term 3 + Term 4, without fitting the model function again?
Akzeptierte Antwort
MathWorks Support Team
am 19 Nov. 2015
Yes. The following example plots the linear terms of a polynomial fit of census data.
load census;
GG = fit(cdate,pop,'poly3','normalize','on');
coeff = coeffvalues(GG);
normedData = (cdate - mean(cdate)) / std(cdate); % coefficients were derived in fit with normalized xdata so normalize it to plot
Y = coeff(3)*normedData + coeff(4); % fit using only the linear terms
scatter(normedData, pop);
hold on
plot(normedData, Y); % plot linear terms
0 Kommentare
Weitere Antworten (0)
Siehe auch
Kategorien
Mehr zu Get Started with Curve Fitting Toolbox finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!