Make polyfit instead of plot
1 view (last 30 days)
Show older comments
Hi,
id like to make this into a polyfit instead of a plot.
% Plotting of FRF
fig = figure(1000+p);p=p+1;
set(fig, 'WindowStyle', 'docked');
set(gcf,'color','w');
subplot(3,1,1);
if HOLD
hold on;
end
plot(f,abs(FRF), color, 'linewidth', 2);
ylim([0 1.5]);
xlim([0,f_range]);
grid on;box on;
ylabel('Speed/Speed*');
4 Comments
dpb
on 2 Sep 2022
What in the world is FRF??? Does the plot bear any relationship to a polynomial of some degree?
With zero useful information, pretty-much at a loss here...
Star Strider
on 2 Sep 2022
@Zakir Mahmood — What result do you want?
@dpb — Probably: Frequency Response Function.
Answers (1)
Walter Roberson
on 2 Sep 2022
polynomial_degree = 3; %adjust as appropriate
p = polyfit(f, abs(FRF), polynomial_degree);
fig = figure(1000+p);p=p+1;
set(fig, 'WindowStyle', 'docked');
set(gcf,'color','w');
subplot(3,1,1);
if HOLD
hold on;
end
plot(f,abs(FRF), color, 'linewidth', 2, 'DisplayName', 'abs(FRF)');
y = polyval(p, f);
oldhold = hold('on');
plot(f, y, 'b', 'Linewidth', 2, 'DisplayName', 'fitted abs(FRF)');
hold(oldhold)
ylim([0 1.5]);
xlim([0,f_range]);
grid on;box on;
ylabel('Speed/Speed*');
legend show
0 Comments
See Also
Categories
Find more on Graphics Performance 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!