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Example Matlab code snippet to read in the 100 µm density grid volume:

    % Download and unzip the density grid file for VISp SectionDataSet   

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Code Block

    % Download and unzip the density grid file for VISp SectionDataSet

    % 100 micron volume 

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size
    sizeGrid = 

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[133 81 115

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];

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 % DENSITY = 3-D matrix of projection density grid 

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volume
    fid = fopen('density.raw', 'r', 'l' );

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    DENSITY = fread( fid, prod(sizeGrid), 'float' );

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    fclose( fid );

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    DENSITY = reshape(DENSITY,sizeGrid);

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   % Display one coronal and one sagittal 

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section
    figure;imagesc(squeeze(DENSITY (95,:,

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:)));caxis(

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[0,1

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]);colormap(hot);

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    figure;imagesc(squeeze(DENSITY (:,:,72)));caxis(

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[0,1

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]);colormap(hot);

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Projection Structure Unionization

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