Removing pages with all nan values from a multidimensional array

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Mathan
Mathan 2022-5-10
评论： Mathan 2022-5-10
Is there any way to remove pages containing all nan values from a multidimensional array. Say I have this multidimensional array:
XYZ(:,:,1) =
NaN 2.2 3.2
NaN 5.7 NaN
1.5 2.5 2.8
XYZ(:,:,2) =
NaN NaN NaN
11.2 92 33.73
NaN NaN NaN
XYZ(:,:,3) =
NaN NaN NaN
NaN NaN NaN
NaN NaN NaN
I would like to have XYZ(:,:,3) to be removed since that page contains all nan values and retain the other two pags. I tried (from https://www.mathworks.com/matlabcentral/answers/152251-reduce-3d-array-by-removing-nan-elements):
remove_pages = all(all(isnan(XYZ),3),2);
XYZ(remove_pages,:,:) = []
but it does not remove the 'all-nan' pages. Any guidance would be great.
Thanks

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采纳的回答

Matt J
Matt J 2022-5-10
编辑：Matt J 2022-5-10
discard=all( isnan(XYZ) ,[1,2]);
XYZ(:,:,discard)=[];
  1 个评论
Mathan
Mathan 2022-5-10
Perfect - thank you! Wondering whether there is any documentation somehwere where I can check more details on multidimensional array (like examples or information where I can check how to remove just rows containing all nan. pages containing all nan, etc).

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