How do you plot a line on a function defined by colors?
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Hello, I want to plot a line on a color defined function (enclosed example below), such that the line follows the boarders between colors. I don't want to plot a line that roughly follows the color boarders but follows the boarder exactly based on the change in color. However, I am unsure how to acomplish this. Any help appreciated.
Example:
3 个评论
Walter Roberson
2023-10-19
Is that a contourf() output? Or is it an imagesc() or imshow() ? or a pcolor() ?
Does the underlying data have sharp data boundaries, or is the underlying data continuous ?
Lulu
2023-10-19
Dyuman Joshi
2023-10-19
Could you attach the data? Use the paperclip button to attach.
回答（3 个）
[X,Y,Z] = peaks(100) ;
contourf(X,Y,Z)
img = imread('image.png');
imagesc(img)
hold on
contour(mean(img,3),'k')
Walter Roberson
2023-10-19
levels = unique(YourData);
contourf(YourData, levels);
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2023-10-19
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