Removing dots from a graph

2022 4 27
1 个回答
更新时间：2022 4 27
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I am trying to make a map using IR Data and some equations. I want to remove the unwanted data so that my final map has the least amount of irregularities. I want to remove these dots that are outliers. I have tried filtering using rmoutlier but that doesnt work very well.

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DGM
DGM 2022-4-27
I should have learned my lesson. I should have known that I couldn't expect R2019b to open an .mlx file with less than 20 minutes of frustration, crashes, and futile spinners.
No problem though. That's just me trying to be hopeful. I can always just open the archive and get the mcode.
So uh. What's eeproject1trace? I'm assuming that's the data, because there isn't any.
Jan
Jan 2022-4-27
@Shahraiz chishty: How do you define "outliers"? Why are the marked dots outliers, but a bunch of others are not? Matlab has no magic power to guess, what you want. So what is the mathematical definition?
Shahraiz chishty
Shahraiz chishty 2022-4-27
@Jan By outliers i didnt mean just the marked ones I just marked some outliers to potray what I meant to say. What i actually want is the Big square with the two little squares in it. Its a map of an envirionment created by IR signals harvested by moving a robot around that specific environment. The miscellaneous dots need to be removed to achieve a cleaner final map.
Shahraiz chishty
Shahraiz chishty 2022-4-27
@DGM Yup thats the data. I had the data imported in the workspace. I thought the code that I saved and posted would have the data aswell.

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回答（1 个）

Image Analyst
Image Analyst 2022-4-27

0 个投票

If x and y are your coordinate arrays, try this
goodIndexes = x >= 0 & y <= 2;
x = x(goodIndexes);
y = y(goodIndexes);
Or maybe you can use dbscan() or swrt() to extract only points that are within a certain distance of another point, so that isolated points get removed.
If that doesn't meet your needs, then say why not.

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