Removing dots from a graph

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Shahraiz chishty 2022-4-27

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1706295-removing-dots-from-a-graph

回答： Image Analyst 2022-4-27

Project1.mlx

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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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 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 2022-4-27

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1706295-removing-dots-from-a-graph#answer_952360

在 MATLAB Online 中打开

dbscan_demo.m

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.