highlight plot with circle

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mudasir ahmad sheikh
评论： Image Analyst 2021-8-23
I have a ber plot and I want to highlight this plot with a circle or any eliptical shape indicating (M×N).
  2 个评论
Awais Saeed
Awais Saeed 2021-8-22
What do you mean by higlighting with circle. Do you mean like this
mudasir ahmad sheikh
mudasir ahmad sheikh 2021-8-22
No! Please see the attached figure

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Awais Saeed
Awais Saeed 2021-8-22
I do not know if its possible programmatically but you can acheive this using the Insert option of figure window

更多回答（1 个）

Image Analyst
Image Analyst 2021-8-22
You can draw an ellipse if you know the center and radii:
https://matlab.fandom.com/wiki/FAQ#How_do_I_create_an_ellipse.3F
xCenter = 12.5;
yCenter = 10;
xRadius = 2.5;
yRadius = 8;
theta = 0 : 0.01 : 2*pi;
x = xRadius * cos(theta) + xCenter;
y = yRadius * sin(theta) + yCenter;
plot(x, y, 'LineWidth', 3);
axis square;
xlim([0 20]);
ylim([0 20]);
grid on;
If you have an existing plot, call hold on before plotting the ellipse so it doesn't blow away your prior plotted data.

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