How to Rearrange Circular Data Sequentially
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My data plots as follows:
The data jumps from bottom end to top end, back and forth, creating jagged lines in the line-plot.
What I want to happen (I created a mock-up) is:
Where the each successive data point in the closest distance-wise to the previous point. I assume I would have to loop through all points and check which is the closest in euclidean space and go to the next point.
I'm a beginner with MATLAB and I'm having trouble implementing this and any help is appreciated.
My data is attached to the post.
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the cyclist
2015-3-11
0 个投票
One possibility would be to calculate the convex hull using the convhull command, and plot that along with the X,Y points.
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Thanks for all your replies. This method more or less solved this problem. Do you happen to know how to spline this points together without creating a closed shape? I was attempting vector valued splines and only recently when I rearranged the data did I see that it attempts to close the shape (links all points together).
EDIT: I know my question is VERY vague but what I have is :
and I do not want the spline to fully close - I want it to spline bit by bit and then simply end without "looping" back on itself.
更多回答（2 个）
the cyclist
2015-3-11
What command are you using to make the plot? It is defaulting to putting in a connecting line, but do you really need that at all? Maybe you could just use the X's, such as
plot(X,Y,'.')
or
scatter(X,Y)
the cyclist
2015-3-11
0 个投票
You could calculate the four-quadrant inverse tangent of your X,Y coordinates, sort them in that order, and plot them as you did in your example.
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