Selecting data points in 3D space

2012 12 14
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更新时间：2016 5 25
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Hi, I am plotting data points in 3d space. what i wish to do is allow a user to select a volume of interest. is there a function that allows to do this? I know that in 2d there are functions such as imrect() and inpolygon() that allow the user to draw a rectangle and then see which points are inside. is there a 3d equivalent to these functions?

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KRush
KRush 2016-5-25
For those who are seeking answers of the similar problems, using viewmtx to map 3d position [x y z] to 2d space is an option. Then you can solve the problem as in 2d coordinates.

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Jürgen
Jürgen 2012-12-14

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Hi, in file exchange there is a file to extract a Volume of Interest, do no if that can help? regards,J

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Itzik Ben Shabat
Itzik Ben Shabat 2012-12-14
thanks. found it. ill give it a try and see how it works. from the documentation it seems like this is the 3d equivalent of inpolygon. do you know if there is a 3d equivalent to imrect() (in order to draw the cube volume of interest to be the input to the file you mentioned from file exchange).
Jürgen
Jürgen 2012-12-14
I looked for the 3d version of inmrect when I saw your question but could not directly find something,
Sean de Wolski
Sean de Wolski 2012-12-14
imrect() works in 3d but only along x/y

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