reorder the data array for the least distance

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Feng 2018-8-29

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关闭： MATLAB Answer Bot 2021-8-20

I have a data array

a =
       1     1     1     1     1     1     1     1     1     1     1     1     1     1     1     1
       1     1     1     1     1     1     1     1     1     1     1     1     1     1     1     1
       1     1     0     0     0     0     0     1     1     0     0     0     0     0     1     1
       1     1     0     0     0     0     0     1     1     0     0     0     0     0     1     1
       1     1     0     0     0     0     0     1     1     0     0     0     0     0     1     1
       1     1     0     0     0     0     0     1     1     0     0     0     0     0     1     1
       1     1     0     0     0     0     0     1     1     0     0     0     0     0     1     1
       1     1     1     1     1     1     1     1     1     1     1     1     1     1     1     1
       1     1     1     1     1     1     1     1     1     1     1     1     1     1     1     1

Which I converted into a two column data array by picking up all the ones using

CC = bwconncomp(a) 
data = regionprops(CC, 'PixelList')

The new data is organized by rows, e.g.,

I would like to reorganize it like

so the connected points are next to each other. Any idea on how to achieve this?

Thanks!

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Answer 1

Stephen23 2018-8-29

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编辑：Stephen23 2018-8-29

在 MATLAB Online 中打开

You can easily use sortrows to get a very similar sequence, which keeps the connected points together, as you requested:

sortrows(data,[2,1])

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Answer 2

Feng 2018-8-29

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Thanks, Stephen, for your help. I tried and instead of going going vertically, it is now going horizontally. The order is from RED to YELLOW as before (picture1) and after (picture2). But what I would like is from RED to GREEN as in picture1