![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/597365/image.png)
Draw a curve in matlab figure
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I need to draw a curve for illustration purposes in a figure together with some other more specific values. I'm looking for something like this:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/596945/image.jpeg)
I need it to be smooth like that one, and have the ability to adjust it. How could i do that?
2 commentaires
DGM
le 26 Avr 2021
Modifié(e) : DGM
le 26 Avr 2021
If you have a few waypoints, you might just be able to do something like this:
x = [0 1 2 2.5 3 4 5 6 6.2 7 8];
y = [0 0.5 1 0.95 0.65 0.25 0.8 1.3 1.3 0.7 0.1];
xf = linspace(0,8,100);
yf = interp1(x,y,xf,'spline');
plot(xf,yf)
axis equal
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/597365/image.png)
There are also ROI drawing tools (drawfreehand, imfreehand), but I don't know how you'd easily go about making such an object into an open curve. Depending on how it needed to be integrated into the figure content, I'd probably just export the figure and add the curve in an image editor that can do practical bezier curves interactively.
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Jan
le 26 Avr 2021
figure;
x = linspace(0, 2*pi, 1000);
y = sin(x).^2 + sin(x / 2).^2 .* x / 10;
plot(x, y)
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