how to do the data extraction data from a 3D matrix

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Lilya 2018-10-7

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评论： Lilya 2018-10-7

采纳的回答： Walter Roberson

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Hi all,

I have a 3D matrix with a dimension of (251*28*10) that I want to extract a specific data from it. As the extracted data are not in the same dimension, the empty values should be NaNs the used loop is

 for i = 1:10
   for j = 1:28
      density(:,:,i) = find(density_1000(:,j,i)>= 27.5 & density_1000(:,j,i)<=28);
      den = density_1000 (density);   % this should be the finle matrix of the extracted data (251*28*10)
   end
 end

Any help will be appreciated.

Thanks

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Lilya 2018-10-7

编辑：Lilya 2018-10-7

the final matrix should contains the specified result for each slice of the third column (10)

Lilya 2018-10-7

@Rik Wisselink

I do appreciate your response. thanks a lot

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采纳的回答

Walter Roberson 2018-10-7

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mask = density_1000 >= 27.5 & density_1000 <= 28;
den = density_1000;
den(~mask) = nan;

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Lilya 2018-10-7

Thank you VERY much :'( this is so helpful!

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