CODEWITHSUNDEEP
pythonnumpymultidimensional-array
kabammi
kabammi

Reputation: 420

3D volume acrobatics in python.. selecting x/y/z rows/columns in 3D numpy arrays

I'm new to ndarrays in Numpy, so please be kind. I have a 3D raw volume imported into numpy as a dtype uint8 array with shape (309L, 138L, 134L) representing Z, Y, X dimensions.

The Raw image dimensions are (x,y,z), 134 138 309

This array is called ThreeD.

I can plot a Z 'section' of dimension XY of ThreeD with

ThreeD[70]

(selecting row 70)

I can plot a Y 'section' of dimension XZ of ThreeD with

ThreeD[:,70]

(selecting column 70)

but of course, there is the extra dimension! These first two are easy to reference, but I'm at a loss of how to select/reference the third dimension.. i.e. the X section of dimension YZ (i.e. slicing a face of the matrix). I should add that I'm not entirely sure of the XZ/YZ dimension here, so those references might be reversed.

I got as far as I did using Sebastian Raschka's handy cheat sheet http://sebastianraschka.com/Articles/2014_matrix_cheatsheet.html

thanks kindly for any help

Upvotes: 1

Views: 983

Answers (1)

kabammi
kabammi

Reputation: 420

ThreeD[70] for Z

ThreeD[:, 70] for Y

ThreeD[:, :, 70] or ThreeD[..., 70] for X

from Jaime. Thankyou.

Upvotes: 2

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