How to removed dashed lines in fplot
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Hello, these horizontal dashed lines are showing up unexpectedly in my plot. I'm hoping someone can tell me how to remove them. Thanks!
The code is as follows:
figure(3)
fplot(kre2(omega),'k',[.01,50],'LineWidth',2);
hold on
fplot(-kim2(omega),'-.k',[.01,50],'LineWidth',2)
hold off
title('Frequency Spectrum For Periodic Unit Cell')
xlabel('Frequency, \Omega')
xlim([0,50])
ylabel('Wavenumber, \xi')
ylim([-pi,pi-.01])
view([90 -90])
yline(0,'LineWidth',2)
采纳的回答
The dashed lines indicate singularities, and I find them helpful.
They can’t be removed, however it is possible to get the XData and YData from fplot and re-plot them.
syms x
y = 1/(x^2-2*x-1);
figure
hfp = fplot(y, [-5 5]);
X = hfp.XData;
Y = hfp.YData;
Y(Y>100) = NaN;
figure
plot(X, Y)
grid
ylim(hfp.Parent.YLim)
That’s the only way I’ve found not to plot the singularity llines.
Make appropriate changes to get the result you want.
.
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