How to make a plot smooth?

I have attached the fig. file of the plot and I want to make the lines smooth without running code again as it takes too much time.

Answer 1

[Star Strider]

It depends on what you intend by ’smooth’.

Try this:

I = openfig('scma25.fig');
Ax = gca;
Lines = findobj(Ax,'Type','line');
for k = 1:numel(Lines)
    X(k,:) = Lines(k).XData;
    Y(k,:) = Lines(k).YData;
    pv(:,k) = polyfit(X(k,:), Y(k,:), 3);
    yf(k,:) = polyval(pv(:,k),X(k,:));
end

figure
semilogy(X', yf')
grid
legend(Ax.Legend.String)
xlabel(Ax.XLabel.String)
ylabel(Ax.YLabel.String)

It uses polyfit and polyval to fit your data, then plots the fitted data in a new figure. It also re-uses your axis labels and legend strings.

[Sajid Sarwar]

@ Star Strider thank you

[Star Strider]

As always, my pleasure!