Plot a curve with coordinates

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Sterre Triezenberg
Sterre Triezenberg 2019-6-22
回答： Star Strider 2019-6-22
Hi!
I determined the peaks of my data. If I plot it, I just get those peaks, but I need a curve through those points.
This is how I determine the peaks:
[Minima indexminima1] = findpeaks(-BoSMax1);
[Maxima indexmaxima1] = findpeaks(BoSMax1);
Pieken1 = [indexminima1 indexmaxima1];
sort(Pieken1);
BoSMax11= zeros(size(t));
BoSMax11(Pieken1) = BoSMax1(Pieken1);
Can someone please help me?

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回答（1 个）

Star Strider
Star Strider 2019-6-22
Without knowing what your data are, this will plot the peak and valley values as a functions of the indices:
figure
plot(indexminima1, -Minima)
hold on
plot(indexmaxima1, Maxima)
hold off
grid
Those should produce plots with straight lines connecting the maxima and another connecting the minima.
If you want to estimate the parameters of a function fitted to those points, there are several options, depending on your data and the functions you want to fit to them.

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